OK here’s my opener
Foden and Alvarez have a higher ceiling than Gundogan and Bernardo
Massive respect and appreciation for Bernardo and Gundogan but Phil central and Alvarez on the right would be even more deadly
Grealish— Haaland—Alvarez
———Foden— KDB
Vs
Grealish— Haaland—Bernardo
———Gundogan— KDB
Playing in the middle field, I really expect Foden to have higher ceil than Gundogan. Not only that, I hope it's true in just the next 1 or 2 years (yeah, that's the stretch goal, but we are with Pep who pushes players to their new height, so why not aim big).
For Alvarez, I'm not sure, he's more like an attacker, maybe number 9, or 9.5, or 10. But Bernardo is more like number 7, 8, 11, 6, 5 or whatever, but maybe not so much about 9 or 9.5. I mean Alvarez is much better at scoring goals, but Bernardo is better at many other things, their role is not really the same, so it's hard to compare.
Anyway, I'd be happy even if I'm wrong and you're right about Alvarez and Bernardo.
For Foden, I do hope we are both right :D