26 hands down. It is much easier to conceal, can accept any mag config, smaller and lighter. It's not even a question of shooting comfort, your pinky shouldn't be doing anything, anyways. Also, no noticeable accuracy loss - where does the 19 have anything on it?
26 is the superior tool.
I am currently debating the same thing as the OP. I was leaning towards the 26 BUT I wish it had a rail like the 19! Still not 100% sure which way to go.