I had the same dilemma a couple months ago and ended up going with the flycam nano. First off, by no means do I think the flycam is a better product; It's not, but it gets the job done. The main difference is the build quality: the flycam is built with cheaper materials and less fine adjustment. Now, I'm not saying it's easy to break but every now and then you need to tighten up the screws/knobs. The biggest piss off was balancing the damn thing, without the easy adjustments of the glide cam it took me well over 8 hours to balance. Don't let the flycam's weight limit fool you, I've balanced double the suggested max weight.
If you value your time/ looking for something that you can beat up a little more- get a glidecam
If not - save a couple bucks with the fly cam and deal with it. I really don't understand why people on here bash flycams so much? I've used both and they do the exact same thing.