$ wise, a used Glock is worth about $150-$200 less. When looking at overall value, Glock almost always wins.
Glock's Warranty and CS is supposed to be top notch. I never have used it though. I am willing to bet that it is better CS than you would get from Taurus. Nice thing about Glock, it that it is similar in one way to the 1911, in that you can get all the parts you want for it and do the work yourself if so inclined. The work itself is probably easier.
Make sure he throws in a bunch of mags of you do the trade to even things out.
The 17 is a riot, but you will have a hard time getting used to it being a 1911 shooter. The trigger is the hardest to get used to part but $20 in parts and a few minutes of labor will help that significantly. The real plus is that you can treat a Glock with utter disdain and it will keep going.
Since you already have the 1911 thing covered, and I have an inherent dislike for most things taurus, and a healthy respect for the Glock, I vote to trade but make up for the price difference in mags or cash.