How is he anyway comparable to Terrance Williams? Williams was an extremely good ball handler and passer in college, Basabe is obviously neither of those things. He's a very good, garbage player on offense, not a guy you can run your offense through.
If you want to make a comparison for Basabe I would say he's a poor man's Hakim Warrick or Stromile Swift.
Warrick and Swift are much longer than Basabe. My comparison to Williams is in regard to what he can be if he moves to the three. He obviously has no future at the 4 in the NBA.