For reference, I've got really big hands and the P226 is the best fitting grip out there for me. The girth and contours are almost like they were custom made for my hand. I find the P239 fits me very well too, particularly with the Hogue aftermarket grip, but the factory one fits too. It is thinner obviously than P226 because the P239 is single stack, but the contours still conform awesome with my mutant basketball gripping hands.
The P239 is extremely accurate, and the short reset trigger is awesome. They are great little guns, and soft shooting too considering the size. I had one but sold it when I needed money, and ended up buying it back a couple years later when I could afford it again. And that's a pretty good price for a brand new SIG.