I have both, had the E-vents longer, and picked up some revolutions at the big game
If you're a heavy breather (like me) E-vents can fog. They ARE very comfy, and they look cool, but when you're in the woods and can't see, they're not so great.
Not had a problem with my revolutions at all. They're (personally) not as comfy, but because of all the extra venting it doesn't fog. I played in 'em all day at the big game without a hitch. You can always get the vortex fan if you do have a problem, which you can;t with E-vents.
Not to mention you can buy any part of the mask in any colour. AGG points to be had there.
So, on the fogging point, Revolutions gets the vote from me.