Yeah, they're both aftermarket engine management systems intended to replace your original ECU.
The benefit is that they allow you to completely mess up, erm I mean tune, your spark and fuel
Unless you're going to make heavy engine mods, go forced induction, or just like to spend endless hours tapping numbers into a lap top I wouldn't bother!
Saying that, I probably will replace my OEM ECU post-IVA, but mainly because I'm a bit of a masochist and like playing around with electrickery