About WS2813 and sk6822 led, we know that both of them is dual signal , both of them dual signal is data ,and it is for one led is broken ,another signal line still can work , 

which make the whole led lighting still can working , it is much better than ws2812b and sk6812, you can think WS2813 is ws2812b led updated version , and SK6822 is

sk6812 updated version , 

        AS we Know , SK6812 have same technical function as WS2812B, they can be compatible . so what about SK6822 and WS2813, in fact ,from the picture 

you can see the difference

                 SK6822                                                                                   WS2813

           You can see the SK6822 LED  only have IC inside the 5050,  but WS2813 LED Have IC and Resistors, capacitors Inside the 5050 LED . 

Learn more , you can visit their Datasheet on our website .