I bought my first P320, a full size 9mm about 4 years ago, loved it. About a year and a half ago, I bought a VP9 and fell in love. Swore it was the king of striker fired pistols. Bought a second one about 9 months ago. The ergonomics, the trigger, the accuracy. I really needed something smaller, so I picked up a P320SC, loved it. Two weeks ago at the range I laughed at my son and his G19. Constant FTF's with 115gr Perfecta. I loaded a mag of it for my VP9. FTF every other round.
Today, I took my 320SC, and brand new 320 Carry to the range. Both fired everything I fed them without a hiccup, even 100 rds of the dreaded Perfecta.
The new Sig trigger is very comparable to the VP9, the medium frame fits my hand well. The VP9 may have better target accuracy, but my 320's do just fine for my needs.