are both kinda OP and even tho the retro is devastating up close, it has that crazy recoil that takes skill to tame (Anyone can spray but can ya down and kill someone with the Retro from 2o feet away with half a clip). So all in all it (The Retro Lancer) is balanced.
Now on to the (read as "my") real issue, the oh so ever present over power of the chainsaw lancer, I saw this for 4 main reasons:
1) Ginormous Clip Size (It can shoot for 10 solid seconds without a reaload)
2) Active Reload Is Too Easy (Its the EASIEST gun to Active in the game)
3) OP Active (The Clip Size + Easy Active = Effortless Kills. 3-4 per active clip)
4) Stopping Power (Why is this the only gun in the game that stuns you and doesnt let you evade, that constant stream of bullets is just plain unfair)
Thats my dollars worth on the situation, you dont have to agree, but dont be an a-hole if you don't...