If he were healthy yes, he'd be better than Wiggins. He was the best center prospect since Shaq, this wasn't some project big that needed to develop a skillset, this was a dude that had everything there and just needed it to be refined and have his body mature. He was better than Oden as well, Greg was raw offensively but was showing improvement, Embiid had damn near everything in his offensive arsenal. Outside of the post moves and shooting, we saw him handle doubles, post and re-post, find shooters, find cutters, dude had it all.
When it comes to centers, there's nothing more rare than the two way center in a 7 foot + tall package, he was that

He had the tools to be elite on both ends of the floor and we may miss out on yet another top tier talented 5. Right now he's falling behind in regards to development, can't play 5 on 5, can't really get game minutes, so Wiggins obviously has the leg up. With the direction the NBA is heading, a two way center that can shoot freethrows is the nuclear bomb to these small lineups, especially with 4 shooters surrounding him.