Sarr, Dembele, whoever, if we're seriously interested in someone, it's because we believe we can do something with them.
I have my doubts about Dembele: injury history, could score more goals but if we're after him it's because we are convinced we can manage his injuries and get him to calm down a bit in front of goal. Don't forget he skied a gilt edge opportunity to kill off the tie at the Nou in the last seconds with oceans of time and space, didn't even trouble the keeper.
I have my doubts about Sarr: Speed is nice but you have to be able to do something with it. Fast players get slower eventually, they need to be able to actually play football too. His touch & decision making need work. His goal tally is fine for a young winger. Again, I'm convinced that he already has what we need to play here if we're targetting him and we can train him to be what we need for all the rest.
Both, either, are fine.
In fact, I think Edwards could convince me that Christian Poulson would be a good signing right about now. That guy can do no wrong in my eyes.