Well, it's more than just trigger pull
Frame:
Glock 17 - polymer
Sig P226 - alloy
Finish:
Glock 17 - Tenifer-treated steel
Sig P226 - Blued or K-Koted carbon steel (W. German production), Nitron finished (black) stainless steel or untreated stainless steel (Exeter, NH production)
Safeties:
Glock 17 - three internal, no externally operated
Sig P226 - three internal, no externally operated
Operation:
Glock 17 - trigger-cocking, DAO
Sig P226 - DA/SA with decocker, or DAO
Accessory Rail:
Glock 17 - yes, 3rd Generation models only
Sig P226 - recently added, older models no
I shoot the Glock 19 and the Sig P228, which are the compact versions of the 17/226. The Glock is somewhat easier to shoot, since I don't have to transition from DA to SA. However, the Sig's SA pull allows for more precise shot placement. The Sig has a higher bore axis than the Glock, and that creates more perceived muzzle flip.
Glocks are more tolerant of daily carry conditions. My 228 requires a light coat of oil for reliable functioning; I pretty much ignore my 19. The Tenifer finish on my Glock is damn-near indestructible. One month in a Kydex holster pretty much wrecked my West German Sig's finish (now it's in a leather DeSantis Speed Scabbard, but frankly, it looks like hell).
Glocks have an amazing range of holster options. You can get an inexpensive Uncle Mike's Kydex paddle holster for about $20, or drop $130 on a Galco Jackass Rig. Sig holster options are more limited.
If I was on a limited budget, go with the Glock. For CQB work, a Glock is more than accurate enough to put JHPs into the boiler room. If you have more cash to burn, consider the Sig. Either would work for CCW.