I wonder if you can go to some website that sells both of those machines and see if you can compare the two? Like, when you do a search for an item, it give you a list of 10 and then you can put a checkmark beside both of them and click a "compare" button?
I actually got the Gazelle Edge. It's not the most expensive one (I think with tax it was a little over $100). I figure that if I used it a lot, if I need to replace it at one time, it worth it. If however, it just being used as a place to hang stuff on...it's not a waste of money. I've used it a lot already and I enjoy it. It is quiet enough that I can watch TV. I think I got it from JCPenny.