Kenny Agostino > Hunter Smith.
At 19 Agostino was over a PPG in college where guys were bigger and stronger than him, Hunter Smith hasn't even a PPG in junior where he dwarfed 99% of the league.
Smith has some upside with his size, but Agostino is ostensibly an NHL forward right now but certainly has not "peaked". It will take a ton of development for Smith to even get near where Agostino was last year,
Smith's size does give him a handicap that Agostino doesn't have as far as counting stats go, but his actual observable skill tanks him hard - to my eye his junior stats are actually inflated.