Both out of Texas, and even though JT was rated higher on 247, Hill had more top school offers. I don't think knee was an issue since that happened in senior year and top QB's are usually offered soph/jr years.
This isn't a negative post vs JT, I actually think he will be a very good QB in time. But watching Hill play last night I came away tremendously impressed. I see no reason why JT can't have the same or similar impact in game one.