6 years older on AW
It's the same to a greater or lesser extent for all the Portfolio profiles on AW.
Alex is 29 on Portfolio's site / 36 on AW (+7 years)
Ava 27/28 (+1)
Alice 26/29 (+3)
Camille 28/33 (+5)
Charlie 38/43 (+5)
Imogen 42/49 (+7)
Lily 23/26 (+3)
Millie 32/35 (+3)
Natalia 26/30 (+4)
Poppy 23/24 (+1)
Summer 32/38 (+6)
Viktoria 25/26 (+1)
I suspect AW are actually verifying ages (at least on newer profiles) otherwise it doesn't make sense that they are universally higher