Onana's better than Ampadu, this is just silly now. Don't be a pub bore, man - you're not arguing and presenting evidence or whatever, you're just asserting your pet thoughts over and over again and taking no efforts to actually prove them.
Different type of players. I've seen Ampadu play a lot for Wales and have always been a fan. He's had a bit of a stop start club career, but looks a bit more settled at Leeds and is doing well there. He is very much in the mould of Kamara as a player (not as good - though I personally think that Kamara is arguably one of the best defensive midfielders around) and would be a decent back-up option to him. I think we missed Kamara after his injury and our central midfield didn't look balanced until Lindelof did so well there in the last few games. Think it's imperative we add another player of that type to the squad over the summer.
Onana is the type of player who is at his best playing alongside that type of player. A lot of his best petformances (the home games over the last two seasons against Manchester City stand out) have come when he's played alongside Kamara.