I live in Canada during the NBA season, so I catch a ton of Raptors games. Due to this, I can confidently say that Carlos Delfino is a much better player than Luther Head. (He's nothing like Novak, btw) He'd be a great second teamer, and I wouldn't be opposed to seeing him in a Rockets jersey.
Absolutely he is much better than Luther Head. It's actually quite an accomplishment that Head is even still in the NBA. His current skill level would be something like the 3rd or 4th best player on a mid-level Euroleague club. Delfino is just OK as a player. He's a backup, not starter material and not the greatest pickup compared to someone like Magette. But still he's way better than Luther Head is. They have to upgrade Luther's role with someone.