I'd give Insigne a shot. He is very young, and I think has more natural offensive talent than Giovinco. He hates playing in Napoli right now because the fans are really giving it to him. He apparently begged Benitez to leave. He is also playing in an unnatural position. He is playing as a midfielder rather than an attacker in a 4-2-3-1. He has stated he doesn't think his position suits him, and is better in a 4-3-3. IMO he's gotta play either as a second striker, or LW in a 4-3-3.
You wouldn't take him and Giovinco though, you'd need to sell Giovinco.
Compared to Giovinco, he seems more explosive, a better distance shooter, and more of a pure attacker. His criticism seems to be his finishing. It may be more of a mentality thing though since his shooting is actually very impressive.
I'm sure he'd come to Juve to get out of Napoli - his hero is ADP...