When comparing SADES K10 vs Razer BlackWidow, the Slant community recommends SADES K10 for most people. In the question“What are the best mechanical keyboards under $100?” SADES K10 is ranked 2nd while Razer BlackWidow is ranked 7th. The most important reason people chose SADES K10 is:
The K10 has interesting backlighting features. Even though it doesn't use RGB LEDs ( here, each LED is a single color - there is no way to change the colors from their rainbow configuration), there are different adjustments that can be made. There are 3 brightness levels, and 6 different modes (breathing, two reactive modes, and a couple of others).
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Pros
Pro Backlighting
The K10 has interesting backlighting features. Even though it doesn't use RGB LEDs ( here, each LED is a single color - there is no way to change the colors from their rainbow configuration), there are different adjustments that can be made. There are 3 brightness levels, and 6 different modes (breathing, two reactive modes, and a couple of others).
Pro Comfortable to type with
The keys are concave on top, helping guide your fingers to the center of the keys and preventing your hand position from changing. There are grips on the bottom of the keyboard to ensure that it doesn't slide around the desk while it's being used.
Pro Ports on the keyboard
The keyboard has a USB port as well as a headphone jack. This makes frequent plugging/unplugging of peripherals easier, expands the number of available ports, and can allow for better cable management.
Cons
Con No switch choice
This keyboard is only available with Cherry MX Blue switches (tactile bump with and audible click at the actuation point).
Con Razer switches
Razer makes their own switches - Orange (similar to Cherry MX Brown) and Green (similar the Cherry MX Blue). They aren't held up to the same QA processes switches from other manufacturers are and there are many claims that switches aren't uniform (pressure and actuation distance is different between keys). They are a bit worse for typing - the actuation distance is a hair shallower - although this is preferred for gamers.