That's fine if you want to look at it that way, but Mariota's stats are better than Jameis, by a decent margin too IMO.
Higher passer rating by almost 10 points. More passing TD's, less interceptions, more rushing yards. Better completion percentage, the same yardage per completion. Two less games played. The only stats Jameis is winning is rushing TD's and overall turnovers

Doing all that with less to work with too.
If you want to say Jameis is doing better in a team statistic, cool. If you want to say Jameis looks better "in person" cool. Marcus is doing it too is my point and in my personal opinion, a higher level.