Thank you!
I've been watching reviews, benchmark tests of them, and I think I'll go with the normal M9. I have large hands but I think 5 inches will be big enough. My current phone is a Galaxy S5 and I'm very happy with it's size.
Fingerprint scanner is not that important but I don't quite like the look of the M9+. Anyway, I need answers urgently because both of them are avaliable today where I'd be buying. I don't have a problem with their prices.