Dude Sanchez is probably as fast as Bernardo Silva. Sanchez is agile but not leaving many players for dead.Sanchez is a better finisher and arguably as quick as Sterling when he's on it especially around the box.
The major difference is the football brain though Sanchez has one.
Pep is working on Raheem but I feel that is natural only so much can be trained.
Sorry but I will not sell a player who is pretty skillful yet blisteringly fast (Sterling)...speed is everything in the Champions League. Ok not really but what a difference it makes. That's why Raz was the standout in the CL.
The club won't sell Sterling either. What was Sanchez at 22?