While I love both games, I slightly prefer Metroid Prime 3.
There are 2 things about Echoes that irk me. First of all, I don't enjoy exploring its dark world as much as its light world. Second of all, I hate that you have to wait until the end of the game to collect about 7 of the 9 Sky Temple keys. I'd prefer being able to fight the Ing Emperor right after defeating Quadraxis.
The only thing about Corruption that irks me is the fact that the missiles are pretty much useless thanks to the PED suit and its Hypermode.







