On a purely individual basis I'd say Salah because Ronaldo had much better players around him who contributed much more to our success that season.
Liverpool have a fantastic front 3 just like that Utd team did but Utd also had a genuine world class defence and keeper along with a good midfield at that time who also played vital roles in our success.
That Utd team didn't always blow the opposition away like this Liverpool team seem to be doing right now it was more built on that solid foundation of defence then relied on the front 3 to make the difference a lot of our wins in big games were quite close games