I have had Eo-Tech, and several aimpoints including the T1 and the PRO.
IMHO the PRO is amazing value. I have been running it on my DDM4V5 and I love the bejesus out of it. While it is larger than the T1, it has built in mount and it has many of the settings that the T1 has. Also the built in flip up lens caps are awesome. I personally like the slightly larger field of view on the PRO. At $450 the PRO is hard to beat and I find it exceptional value.
I did not feel the same way about my eotech, the battery case rattled and I found it would eat batteries like crazy. The aimpoint is great as you don't have to worry about your batteries leaving you screwed, generally they have a 5-8 year life span of continuous use. One thing I did like about the Eotech is the 64 MOA dot for targets 25-50m away, the Aimpoint 2moa and 4moa are handy but I found them more useful at longer ranges.
To be honest I would buy another PRO over both of them for value, durability, quality and performance reasons.