I don't own a glock yet, but I do own 3 Hi Powers, and carry one of them.
Really, they're pretty different. The biggest difference for me -- and the one that makes a BHP more of a "serious" pistol for me -- is the grip angle. You really need to hold both of them, preferably side by side. That should tell you almost instantly which one is for you.
The subject of chamber support was brought up -- but I have NEVER heard of any problems with 9mm Glocks. I don't think this is an issue.
Do you like having a hammer? A thumb safety? Do you like to be able to change the grip of the pistol to suit you? Do you like a skinny gun, even though it's a little heavier? Then you might be more suited to the Hi Power.
Would you rather not have a hammer? Would you rather not be bothered by a thumb safety? Is the factory grip of the Glock suitable to you? Do you like a lighter gun, even though it's a little thicker and blockier? Then you might be more suited to the Glock.
Reliability of both guns is incredible. Durability for either gun will likely not be an issue. Both are military pistols and can handle hard use.
I don't agree that the FN has to be a range queen. I use mine just like I use any other pistol, and I trust it completely. Beauty is in the eye of the beholder, but not all of the HP's beautiful qualities lie on the outside.
Most of the responses to these threads are 95% opinion. The cold, hard fact of it is this:
Only you can decide which one is best for you. Handle them both.
Wes