Rondon and Mitrovic are absolutely not comparable.
One is an older player who whilst definitely having some qualities, is absolutely not a reliable goalscorer. The other is a young player with lots of potential and a very underrated goalscoring record.
I'm not saying Mitrovic is the answer or even an exciting player to be linked with, but to categorise him with Rondon is bizarre. Unless we're literally just going off the fact that they have played for a couple of shit PL teams each?