I think that Shurna is a nice player and he could very well stick. He is a good shooter and can handle the ball. Royce is more of a brawler, but has a very good handle and unreal passing ability for a big. I think that RW will get drafted much higher and have a better career. If he can improve his shooting, which happens with most NBA players over time, he can be dominant. Shurna is more of a second round guy and future role player in the league at best.
As for Fizer, he didn't have Royce's overall game. Although, he was starting to play pretty well for the Bulls until the knee injuries took him out. Definitely a draft bust, but he wasn't totally at fault for that. No way RW is around when the Bulls pick.