After watching all the videos of these two kids, I have no idea how Tyler is ranked above Codi.
Codi has a better shot, better frame, good handle, he's quick, he can dunk the ball, and he can elevate off the dribble on his jump shot.
Tyler has a better handle and court vision, but 5'11" must be with tall shoes on, and that step-back push jumper will be useless in the college game against athletic guards. That doesn't look like a kid who will develop like Ish did physically.
I could see Tyler being successful as a pure passing point guard, will probably rack up assists... But he has a lot more to overcome than Codi does to be an effective ACC player. Somehow all of his highlights have him covered by a kid the same size as him.