Not including last year when Rashford was horrible, Rashford and Sterling have had very similar stats despite Sterling playing on a far better team.
--------------------------Goals-----------------Assists-------------------Games------------------Goal Contribution per game
Rashford------------55------------------------30----------------------------179----------------------------- .47
Sterling---------------97-----------------------51----------------------------297------------------------------ .50
Raheem Sterling vs Marcus Rashford: Decoding the stats | NewsBytes (newsbytesapp.com)
But go on....tell me again how Rashford hasn't reached the same heights as Sterling. And my god, if you are going to sell every player who doesn't score and assist as much as Mane and Salah then who are we going to have left in our team????