it's all cosmetics. While the v2 is probably easier to work on than a v7 or v7 hybrid (for CA and g&g) all AEGs can be made to shoot the same range and fps and rate of fire. It's what you like the look of or want to haul around the field. I found the soc16 heavy and cumbersome to haul around the field, hence why I went in the opposite direction and got a p90. My g36 at full length is still easier to handle than the soc16 as well.
All 3 of my guns shoot out to 60m accurately with ease which is farther than almost all engagements I've come across.
I futz with V2s, V3s and V6s. I could be wrong... but probably, most likely not, as far as I know.