Verified answer

P90, more ammo, looks less like crap, and i find it easier to use at mid-long range

I use the pp90m1. To me I really can't stand a gun (p90) that looks like its taking up a good bit of the screen that's just me. The pp90m1 is good for close to medium range but it can work for long ur just gonna have a hard time with it unless u can get the headshot for sure:

PP90M1 for me, easiest weapon ever.