The SK6822 is a WS2813 clone with almost the same technical specifications.
Differences
Its input voltage range seems wider (3.3-7.5V) than the original, allowing 3.3 microcontrollers to safely operate them.
Then again, the original WS2813 tolerates 3.3V as well when the distance between first LED and microcontroller is less than 30cm.
When To Use
SK6822 may be an alternative when price matters.
When To Not Use
This is a clone trying to mimick the original WS2813.
While some of the specs seem improved over the original, you pay the price elsewhere:
There are reports about strange timing issues and smaller LED die.
Clones can be perfectly ok but do not always come with the same quality (i.e. smaller LED die = less brightness or issues with the data protocol)
If you don’t want to be a test pilot, choose the WS2813 (if you need redundant data wires) or the cheaper and well proven WS2812B. Both are not much more expensive than the clones anyway.
Datasheet
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(content created Mar 09, 2024 - last updated Mar 19, 2024)