I have 1 Vortex Strike Eagle 5-25 and 2 EP5 5-25. My own experience is they are pretty similar in terms of glass clarity. The EP5 eye box is more forgiving and the eye relief is also a tiny bit longer. The EP5 overall is more comfortable to shoot for those 2 reasons. But the Strike Eagle not bad by any means.
Price wise, the EP5 is 20%-30% cheaper than the Strike Eagle. For a trainer rifle that shoots no more than 500 yards, I think both are just fine which is why I have mine on 308 and 223.
I also have a Razor gen 3 6-36, ATACR 7-35 and a Mark 5HD 5-25. The EP5 is nowhere close to the glass quality to those guys. But if you don't shoot beyond 500 yards, I don't think it's worth the extra $2K to buy those advanced scopes. I think that's another reason I feel more comfortable shooting the EP5 and Strike Eagle because I don't really care if they get dinged or scratched. They are trainer scopes and I don't really care that much.