The mirrors on our Allegro Bus are higher up than the Entegra mirrors. I'll trade you any day (of course that would include the coach
The higher mirrors don't let you see the rear tires. Or, you can angle them down to see the tires but then you lose the distant view. So you either get to see who's coming up behind you or you get to see your tires for those tight maneuvers - but not both.
One thing I liked about the Entegra when driving them was the lower mirrors. They have a better perspective and let you see the tires as well as way behind the coach. Plus, the higher mirrors give you a blind spot at intersections. Entegra's mirrors are low enough that you can see over them and you won't get surprised by cross traffic at an intersection.
The reason Entegra can offer a lower mirror mount is because their windshield is taller (actually, lower might be a better term). The lower windshield lets you see better when parking or maneuvering because it eliminates some of the guess work as to where the front of the coach is. If Tiffin lowered their mirrors they would be below the windshield so they can't do that. I'll take Entegra's mirrors and windshield any day.