Wilson was a more effective and more efficient passer in college than Manziel. Anybody who saw the two play would agree, unless they had some sort of bias. Wilson also played with a much less talented roster than Manziel. Mussop has clearly demonstrated a bias toward Manziel during this draft cycle, so no surprise to hear his opinion.
Anyway, this is a rehash conversation, but that's basically what this thread has been for the last month or so.