How far are you shooting? I have a March Genesis that's currently on a 338 but will eventually go on a 375 CheyTac. It's been great so far, has 114 mils (400 MOA - four hundred - not a typo) of vertical. The thing about how it works is the entire tube moves instead of just the reticle lens inside the tube, so the reticle stays centered in the lenses across the entire elevation travel range, no distortion at all. It's a 60X, which is IMO more than what's practical in any type of mirage. Highly recommend if your 375 is an ELR gun.
I was shooting it today and I couldn't really tell a difference between the March and my Tangent Theta side by side, but the Athlon Ares ETR was very obviously lower quality. Not that I'm trying to compare ~$6k scopes to a $1k scope, just that the better two were very similar alongside something that was very different. 80*, full sun, I was running 25x at 500 yards on all the scopes and it was great.
I'm wanting to order one of the new Majestas like what you linked to for my 6 Dasher, running this March I've been very impressed.