I have installed many normal ones and have gotten pretty good at it. How much harder/different is it installing glass?
As long as you turn the phone off and use the hinge method you'll be golden.
Much easier. Run the hot shower for a few minutes to get your bathroom all steamy to get the dust out of the air. Tape your phone to the toilet seat so it doesn't move while you are applying it. Hold the glass screen protector at all four corners after removing the plastic over the adhesive. Drop it centered on the phone.
No pulling screen protectors up because it is misaligned. It's easier to misalign with plastic ones, because you only align one edge before you stick the rest on, whereas glass ones, you have to align the whole thing from the start.
I actually don't like the hinge method. For some reason, I find it more difficult. But like with the Zagg Glass, it has the tabs on top and bottom which make laying it on the phone straight so much easier now.