bass boat or deep v

I am kind of ignorant on which type to get and why you guys prefer one over the other. I am leaning towards the bass boat. I have fished from both. The bass one seems easier to fish from(big deck in front and back, easier to manuver). Why do most walleye fisherman use a deep v? Can't you back troll with a bass boat? Been to Canada several times and 95% of what I see are deep v's. How come? Where I fished there always was a guy that lived by the Ozarks. He had a bass boat. We talked about the two boats. I thought the deep v's would be better on the bigger lakes. He did not agree. Some of the lakes he fishes on in the south were many times bigger than what I have fished in Canada. He said that his could handle rough water as good or better. Once saw him on the biggest part of the lake with white caps. I was in a friends deep v. We were heading back in rocking and rolling. He flew by us and looked like he had a pretty smooth ride. Back to my question why a deep v or a bass boat? Thanks for any help.