What’s the different between SP19-A and SP19-D

Those day,some customer ask me what the different between SP19-A and SP19-D,now i will tell the big different of them.

First,the price is different,SP19-D (99.99 EUR)is a new arrival,and it is cheaper then SP19-A (133.99EUR).

Second,the outlook:

SP19-A

This hole is real,and can use to connect cable.the quality of board is better.

SP19-D

This hole is useless,just a hole there.