For me it’s quite close, but I’d say Mane edges it.
With Salah you know from the first few moments of he’s up for it or not, which thankfully he does look sharp so far, but if he’s not, you know so from the start.
With Mane he’s a lot more explosive and can score a wider variety of goals, even on a off day he can randomly pop up with a goal or two from nowhere, I also think he’s harder to mark out of the game because he’s so unpredictable, whereas I think some of the better players in the world can adapt to Salah the longer a game goes on.