I've had both. I still have the Aimpoints (ML2's)
I actually prefer the Eotech's heads-up, non-tube-like display. At close range the 65MOA circle is way fast. The 1MOA dot is a little small for my tastes, unless the brightness is turned up all the way.
Don't expect to get the 500 hours out of the AA Eotech if you plan to use it outside during the day. The default brightness setting (which is how they get the 500 hour number) doesn't make the reticle stand out enough. At 3gun matches I have frequently seen users waiting to turn on their sights until the buzzer sounds, then finding they have to pushpushpushpushpushpushpush the button up from the default level just to get it bright enough to shoot with.
You would think they'd just leave the sight on and turned all the way up for the whole match, but maybe due to the short battery life and/or the cost of the Lithium AA batteries most users seem to have a subconsious need to turn them off as soon as they finish shooting. The Aimpoint's tube design doesn't seem to need the brightness turned up as much to be useful, so I would expect to get around 2,000 hours of use (rated at 1,000 hours on the brightest setting).