I'm still a noob in CoH and I plan to squeeze it for all I can for a while before I consider CoV. I will burn out on this like I have with all the others so I want to streatch it out as much as I can.
Gameplay in both is quite similar - the main differences are the environments and your superpowers - but you can go back and forth between them quite easily.
I play as CheneyChick and Major Snoobage on CoH, and as HillaryClinton and Demoncrat on CoV.