I've got both, although my wife mostly uses the 26.
I'd prefer the 19. The 26 takes some time to get used to due to the short grip. It's a fine gun, though.
The 19 disappears in your pants as easily as the 26 and has 5 more rounds. If you're only considering CC, there is not need for the 26, IMHO.
All Glocks are great guns.