R6 Vegas Vs. R6 Vegas 2

i don’t own any of these games but i’ve tried the demo of the first one and i liked the gameplay and such but waited with the eventual purchase since vegas 2 was so close to release.
Now, does anyone have both these games? if so, would that person be kind enough to make something like a list on what both games have and don’t have in comparison. i don’t care that V2 has the same controllers and stuff, i liked it in the demo so i have no problem with it.
i’ve also read a bit about V2, does 1 have an exp-system and upgradable weapons too?

tl;dr: is vegas 2 better than vegas? why?