If your looking for no faff and long lasting battery get the MVP. If your going to be buying mods in the future that require batteries you might want to get the v5.
Or save yourself the trouble thinking about it and buy both
I bought a ss vamo v5 from Myepack a couple of months ago, it's a really great setup - also just bought an MVP 2.0 from them aswell - can't fault ash on his prices or customer service