played for BYU, they are very different players. Harding is a better athlete - much better handle and much quicker. The Tripple kid not only is 3 inches taller, he has super long arms. Someone compared him to Hartsock, but he is a better athlete, although not nearly as stout (although maybe Hartsock was a string bean before his mission too).
I'm not sure there is a great comparison for a recent BYU player to this kid. One kid I do think is a good comp, although I only ever have seen him play on TV is Brendan Bailey, the LDS kid who is playing for Marquette - long kid who's a decent athlete and really likes to shoot from outside.