Not to take anything away from Destro, I think he's more developed than Gabbiadini right now and ready to play more but Destro started and got way more minutes than Gabbiadini. Gabbiadini was always a sub.
I think both will have bright futures.
Juventus are still after Destro, despite interest in other players like Jovetic. Juventus would take a step back if Siena-Genoa insist on the 15M price tag. Gabbiadini is our alternative.
It's always been like that. It's not that Destro doesn't want to move to a big club (Juvenetus, etc) he's being swamped with many clubs. He has to decide.