A few things to consider:
1 - Bassett wouldn't be allowed to compete here unless he was going to be 18 before the end of the year, so he isn't 16.
2 - Shnaulty is also considerably smaller than his NCAA days. It is clear he is much smaller.
3 - Styles make matches. Shnaulty lets folks to his legs real easily. Bo gets to legs easily. That means the transition will be rather seamless to converting them. Once you get down a score or two the guy who us down will typically open up and try to force thr action. That is also something that doesn't play in to Shnaulty's wheelhouse.
Bassett could beat Shnaulty 10/10 times and Shnaulty could beat Kolodzik 10/10 times. That does not mean Bassett beats Kolodzik 10/10 times. Hell it doesn't mean he beats him 5/10 times. Kolodzik has a well rounded game and poses a serious threat to beat Bassett.
Edit: Bassett doesn't have that sort of strength advantage that you are implying here. It is his fearless motor.