WS2812B is an upgraded version of WS2812. They are an integrating control circuit and the intelligent external control LED source of the light-emitting circuit, package WS2811 into 5050 LED SMD. The features and benefits between WS2812 and WS2812B is the WS2812B has intelligent reverse connect protection and the power supply reverse connection does not damage the IC.
SK6812 has RGB, RGBW, WWA, SK6812 RGB is similar to ws2812B led, the main difference between the two drivers is that SK6812 has voltage-independent color and brightness in a wide voltage range, which means that the color of the LED should not Like the WS2812B, it is affected by the drop in the power supply voltage. In addition, in our test, the quality of the SK6812 LED is much better, when the temperature is high, ws2812b is easier to die than SK6812.
SK6812 mini 3535 is a mini version of SK6812 LED. Its size is 3.5mm*3.5mm. Except for the different sizes, it is exactly the same as the SK6812 LED.
The WS2812B/SK6812 LED strips come in three different spacings—30, 60, or 144 pixels per meter—and it’s sold in meter lengths.
Here are samples of WS2812b & SK6812 addressable strip