doesn't seem to inflate the stats of the bad players. The argument the other way can be having good teammates inflates stats because they make a players game easier. Better teammates to pass to, bigger threats for the defense to concentrate on, better defenders to help the player out etc. Deron Williams comes to mind - went from a superstar, to a (atleast statistically) weaker PG.
But here's another comparison (includes per 36, %s, some advanced #s etc)
http://www.basketball-reference.com/...ryky01&y2=2012
a quick look I think its fair to say Lowry probably comes out as the better player, although Jack was slightly more efficient (in eFG%, and assists/turnovers). I'd say Lowry might not be quite as good as fans are hoping he will be (take that as a relative term - not quite an all-star, but hardly an 'average' player either), and Jack was a bit underrated while he was here.