I see Rodrygo as a Premier League player, i mean he is fast and have very good finishing from a long time the Premier League is focus on this type of strikers and not into the clasic number 9, only Chelsea with Delap in this recent market own a clasic 9 in the top teams.
Rodrygo can be something like Gabriel Jesus i believe, maybe a little bit worst.
Delap was a significant signing for Chelsea, but I don't think he's a player comparable to Rodrygo. Delap has adapted to the Premier League and, in my opinion, has become a quality player. Rodrygo, if he's transferred, will have to adapt to the Premier League. If he adapts quickly, he could be successful, but if he doesn't, he could be as ineffective as Richarlison.