It’s better to not compare to Mahomes. That kid has 20 more touchdowns than Brady. He’s in debates with Brees, Luck, and Rodgers
No reason to compare Allen to any other QB except Tyrod, Peterman, and Anderson. When the dust settles we can compare him to other rookies, but even early success doesn’t guarantee future performance. Have to hope Allen will get better, and an offensive revamp in 2019 would help him immensely