Well, my .02 is....I have shot both and as far as performance goes, it's really 6 in one hand, half dozen in the other. The triggers are different, it depends on your liking. Weight, height, length, somewhat similar, not enough difference to split hairs over, (to me, just my .02) just depends on what you want to use it for...EDC, HD, target, etc. Reliability, again, 6 in one, half in the other...Both manufacturers have excellent track records for reliability, as well as outstanding service departments should the need ever arise.
The one thing the Springfields have over the Glocks is the goodies that come with a new purchase, holster, mags, mag holsters, they run specials from time to time where you can buy a new gun that comes with 2 or 3 mags, send in a coupon and get one or two more free. pretty sweet if you ask me!
The functionality is what I suppose you should focus on...I.E. Which do you shoot best, which is most comfortable to you...only you can answer that. See if you can't try some out, rental range nearby?
FWIW...I ended up with the G30 for my winter EDC, it's just what fit me best, although I wouldn't have minded not having to spend extra cash on spare mags...
Hope this helps!