Only flown one of em, but for those that say that they both suck as passengers, I mean, yeah, that's true, BUT, I'd still say sitting in back on the ERJ is noticeably better than a CRJ 200.

The CRJ 200 windows are like little tiny port holes and they're practically down by your elbow and the cabin is hot as all get out in the summer. In the back of the ERJ you actually have decent sized window at a useable height and the a/c works pretty well comparatively speaking. Only real draw back in my eyes for passengers on the ERJ is the bread-box sized overhead bins.