ws2818 Addressable led strip VS ws2811/ucs1903 digital led strip

Ws2818 12V 30led 60led magic color break-point continue/resume led strip can replce ws2811 ucs1903 digital led strip

When i get one ic off from ws2818 and ws2811 led strip,ws2818 digital led strip can work normally,ws2811 can not. After the broken ic,ws2811 can not work,but ws2818 is break point continue/resume,so,it can work normally. Also,ws2818 have 4 weld pad,ws2811 only have 3 weld pad.