TexasCHLforum.com

I own a sig p226, M&P full size VTAC 9 mm, Glock 17 Gen4, Glock 19 Gen4, and Colt New Agent.
I have used both the Sig p226 and the Glock 19 in separate pistol courses (round counts 500-800 each course).

My preferences are as follows:
Grip ergonomics-unmodified out of the box: Sig p226
Bore axis- Glock
Engineering quality and feel: Sig p226
Trigger preference: Glock after modification (GHOST connector, polishing)
Sights out of the box: Sig night sights
Performance during pistol courses: Glock
Comfort during carry conceal: Glock (lighter)
Availability of accessories: Glock

What do I prefer overall? I carry concealed a Glock Gen 4 but I have had to modify it significantly. The reconstructive surgeries on my Glock have included: Grip reduction to better fit my hands, heavy stippling, changing sights to Ameriglo I-dot sights, and Ghost Evo Elite connector and polishing. Once you have made all of these changes, the price matches the Sig but my glock now fits and feels great. You cannot modify the Sig very much except for the sights.
The Glock performed much better in terms of handling and accuracy (after above modifications) during the courses. The accuracy of the Sig was great once the SA kicked in but as others have mentioned, the initial DA to SA transition threw me off too many times. Carrying the glock is much more comfortable because of its lighter weight.

Hope this helps.