It's rare that any forwards play 20 minutes a night. Only maybe 10 guys play 20 min a game (Getslaf, McDavid, Kane, etc). None of our forwards did this past year. Z Averaged the most with 19:45 and the next forward was Nyquist with 17:26. If you're really asking for that, it's unreasonable.
As for AA vs TT, I think AA could have a higher potential, but I think he has some growing before he finds consistency so I wouldn't expect him to have the higher numbers this year.