I havent tried an AM1, but my minute 1 replaced a MX Comp and the difference was amazing. The minute 1 is 10x plusher at 60psi in the spv and has absolutely no brake dive. I also have a black super air and the brake dive is horrible. Its a bit flexy but i'm happy with it. I would think the AM1 would be more supple since it has dual hydro dampers. I love the simplicity of the manitou though, its really easy to overhaul and change the fluids.