Hard to say as Perez seem's to have lost his killer instinct, but Scott is chinny. Perez probably win but I wouldn't rule out a Scott victory. If I had to call it id say Perez tko 5, Scott outboxing him for the most part but eventually taking too much damage and quitting.
Perez, way too physical and he won't be wowed by Scott's boxing skills, which he can match. (at his best)