The Keychron K2 (Version 2) and the Keychron K8 are essentially the same keyboard in two different sizes. The K2 is 75%, while the K8 is 80%. The K2 is available with various Gateron switches, but the K8 has both Gateron and Keychron Optical switch options. That said, both keyboards have a hot-swappable variant that lets you change the switches without soldering. Latency is better on the K8, but the difference shouldn't be noticeable to most people.
The Keychron K8 and the Keychron Q3 are both TKL-sized mechanical keyboards designed for office use. Both keyboards are hot-swappable, though the K8 requires you to purchase that specific variant. This means you can change out the stock switches for any you want without soldering. However, they have a few differences. The K8 is wireless and pairs with up to three devices simultaneously. On the other hand, the Q3 is wired-only, but it has better latency, and all keys are macro-programmable as it has companion software, which the K8 lacks.
The Keychron K8 is a larger version of the Keychron K6. The K8 is a TenKeyLess (80%) keyboard, while the K6 is 65%; both keyboards are available with Gateron or Keychron Optical switches. If you plan on using it for gaming, the K6 has lower latency, although you have to use it wired.
The Keychron K1 and the Keychron K8 are both wireless TenKeyLess keyboards with similar features. The main difference is that the K1 uses low-profile switches, whereas the K8 uses standard switches. The K8 has slightly lower latency, but not by much. Neither have customization software to change the backlighting or to set macros.
The Keychron K4 is essentially a full-size version of the Keychron K8. There are some small differences, though, The K8 feels better built, and it offers two incline settings, whereas the K4 only has one. The K8 uses Gateron switches, but you can also get it with Keychron Optical switches, and it has a hot-swappable version that lets you change the switches without soldering. The K4 is available with various LK Optical or Gateron switches.
The Keychron C1 and the Keychron K8 are very similar TenKeyLess mechanical keyboards with a few notable differences. The C1 is a wired keyboard with a full plastic frame and better latency. On the other hand, the K8 connects wirelessly via Bluetooth, and the unit we tested has an aluminum plate, adding to the already solid-feeling build quality. They both have full RGB lighting and are hot-swappable, so you can use switches other than the default Gateron Red, Blue, or Brown switches available to both. The K8 also has an additional hot-swappable version with optical switches.
The Keychron K8 is a TenKeyLess wireless board, while the Keychron Q1 is a 75% compact wired board. You can use the K6 wirelessly via Bluetooth and pair it with up to three devices at once. The K6 has more incline settings, and it comes with shine-through keycaps, which help make the legends easier to read in a dark room. Thanks to its switches' transparent casing, white backlighting looks white, while the Gateron Phantom switches on our Q1 unit have a brown casing, making white lighting look red. On the other hand, the Q1 is hot-swappable, and it comes with customization software to set macros to any key. Also, while we bought the fully-assembled variant, the Q1 has a barebones version.
The Keychron K8 Pro [K2 Pro, K3 Pro, K4 Pro, etc.] are the upgraded version of Keychron's K Series, which includes the Keychron K8. While the performance remains similar, Keychron made notable improvements to the build quality on the K Pro Series with new PBT keycaps, screw-in stabilizers, option aluminum frames, and two additional layers of foam inside the case for better acoustics. The K Pro Series are also the first wireless keyboards from Keychron to be compatible with the VIA companion software, so you can fully customize your layout, macros, and RGB backlighting.
The Keychron K8 and the Keychron K3 (Version 2) are both wireless mechanical keyboards designed for office use. The K3 V2 is a compact 75% low-profile board that offers better ergonomics. It uses low-profile switches, and if you elect to get the variant that uses Keychron Low Profile Optical switches, it's also hot-swappable. On the other hand, the K8 is a TKL size with a high profile and uses regular Gateron switches, so you have your choice of tactile Brown, clicky Blue, and linear Red, depending on the feeling you want. Overall, both boards perform similarly.
The Keychron Q8 is a wired-only Alice layout keyboard from Keychron's premium Q-series lineup. Alternatively, the Keychron K8 is a wireless keyboard with a TenKeyLess size from Keychron's more budget-friendly K-series lineup. The Q8 has companion software, which the K8 lacks. The Q8 is better suited for permanent desk setups, while the K8 is more portable and more versatile.
The Keychron K8 and the Keychron C1 Pro are mechanical keyboards with TenKeyLess form factors. The K8 is a wireless model with ABS plastic keycaps. On the other hand, the C1 Pro is a wired-only model with higher-quality PBT keycaps. The manufacturer also advertises the C1 Pro as compatible with QMK/VIA, while the K8 is not.
The Keychron K8 and the Durgod Taurus K320 are both good keyboards that are designed for different uses. The Keychron is a wireless keyboard designed for office use, and it's available with a variety of Gateron switches. It has full RGB lighting, which our unit of the Durgod doesn't have, but you can get a variant with it. The Durgod is a wired keyboard designed for gaming that's available with a variety of Cherry MX switches, and every key is macro-programmable. The Durgod has dedicated software, but the Keychron doesn't.
The Keychron K8 and the Keychron Q2 are mechanical keyboards with different features. The K8 is a TKL board with a wireless connection, while the Q2 is a compact 65% wired-only board. Unlike most Keychron offerings, the Q2 has companion software to remap keys, and since it's wired, it has a switch at the top to toggle between Windows and macOS modes.
The Keychron K8 is a better keyboard than the Logitech K360. The Keychron has a much better design and build, full RGB backlighting, and is Bluetooth-compatible. That said, the Logitech has a lower profile and has dedicated media keys.
The Obinslab Anne Pro 2 is better than the Keychron K8 for most uses. Gaming-wise, the Obinslab has much lower latency, macro-programmable keys, and software for customization. On the other hand, the Keychron has better ergonomics because it provides two incline settings, and it has media hotkeys, which the Obinslab lacks. While both keyboards are available with various switch options, the Keychron has a hot-swappable variant that lets you change the switches without soldering.
The Keychron K8 and the Keychron K12 are similar wireless mechanical boards, but the K8 is a TenKeyLess size while the K12 is a 60% compact. Both have RGB backlighting and can pair with up to three devices at once. If you prefer having a dedicated F-row, dedicated navigation keys with arrow keys, the K8 is a better choice. It's available with Gateron and Keychron Optical Red, Blue, and Brown switches, and there's also a hot-swappable variant with Gateron switches. If you prefer a very compact board that doesn't take up much space, the K12 is a better choice. It comes with the same switch options as the K8, but it's also available with Keychron Mechanical switches, Keychron Optical Banana and Mint switches, and in a non-backlight variant.