Really Really need some advice on 5D2 vs 6D

[hanracing]

I now owned mk2 and mk3 and 6D ( sold for mk3)

I compared 6D with mk2 .

6D wins in ISO and focusing speed

While what the older mk2 can offer ? well,the reason why I still keep my mk2 and sold 6D is because that mk2 somehow give me a very pleasing colour and sharpness which 6D can't compare ( just my personal opinion )

However, 6D is good at low light comparing to mk2 especially at low light.