I can't speak from experience on eVent, but from what I've read and researched it is supposed to have better breathability than Gore-tex. Same is true, I think, for Mountain Hardwear's Dry.Q Elite fabric. But I think the difference for the average user is probably negligible. No experience with those fabrics so I can't say for sure.
Again, I love hard shells with a waterproof membrane (and I usually go after Gore-tex too, probably because they are great marketers) because of their effectiveness from keeping out the wind and weather, but the reality is that no hard shell is going to be anywhere near the breathability of a soft shell jacket, fleece, or blended hoodie. That is the main reason for pit zips on hard shell jackets.
Having said that, comparing the Gore-tex stuff that I've worn to old, less technologically-advanced raincoats, I definitely notice the difference in breathability.