Both good guns; but I'd select the Beretta 92FS.
Back when I was issued the P228 9mm, I purchased the equivalent Beretta 92F Compact (92FC). I preferred the 92FC due to it having manual safety, it fit my hand better, I shot it better, and the action and trigger felt smoother in my hands.
I am currently issued the P229 which it, like the SIG P226 and P228, is a great gun; I even prefer my Beretta 96F Centurion over the P229....and I like my Beretta 92 FC Type M over my SIG P6 which are both eight-shot/plus one 9mm's single stack guns.
What can I say....I like my Berettas!