Is glute ham raise the same as roman chair or hyperextention?

The glute ham raise is far more difficult. A person entering the gym for the first time can do 10 hyperextention repetitions. The roman chair is a little more demanding, but not by a whole lot so maybe after a month or two a few reps at the very least is a given. With the GHR, even 2yr+ of heavy lifting with above twice bodyweight squat is no guarantee for a single repetition.