He's significantly better as a prospect than Gabbert, and it's not close.
But when you enter the Matt Ryan territory there's too much gray area to say beyond a shadow of a doubt he's better.
IMO, if you do that you're entering the homer territory Dane is harping on about.
Alex Smith's current 9.8 YPC is one of the lowest marks in the NFL over the last 10 seasons. Only a few QBs have been worse:
Ryan Mallett (9.8), Derek Carr (9.4), Christian Ponder (9.8), Brady Quinn (9.8), Ryan Fitzpatrick (8.6), Brodie Croyle (9.7), Charlie Frye (9.7), Bruce Gradkowski (9.4), David Carr (9.2)