Alienware 17 R9 M290X - New Driver Question

Hi there,

I was looking at the Alienware drivers for windows 10 and came across the new

Video_Driver_83G9K_WN32_15.200.1045_A00.EXE 

----BTW does this (above) support DX12 ? ----

Amd however have the new

AMD Catalyst™ 15.7.1 which has the new 

• AMD Catalyst™ Display Driver version 15.20.1062.1002​

So I was wondering, how do these drivers differ and should I get the one on Dell's drivers page or AMD's ? 

I know AMD's support DX12 but does Dell's ? 

Thanks for your help :  )