Alexander Arnold is 20 years old and is going to be voted as the best right back in the world next year. There's 14 months between them. I'm sorry but you can rate Max Aaron's all you want, to claim hes ahead of TAA or more rounded or anything is frankly ridiculous. TAA had a few bad games, of course he did. He just turned 20 this past season. Ronaldo and Messi both had fecking bad games before 20.
I haven't seen much of Aarons, I dont doubt his potential, but to say he's more promising than player who was head and shoulders the best in the premier league, set creativity records in the league, reached his 2nd CL final as a starter only at the age of 20 and won it this year (and was a key player throughout) is frankly an insane opinion. The jump from the championship to the premier league and then to the champions league is crazy big. And TAA's performances in those are far ahead of Aarons' in the championship anyway. At basically the same age.