Anomalies shouldn't be mistaken for trends. Mizzou's class strength is based on the QB Horn that UT apparently passed on and a 5* DE from East St Louis. Still a great class for a program that hasn't been in the top 25 for a long time.
UK had the #25 class a few years ago but this is the highest rated class they've had by a long shot. Worth watching... the 5* OL commit that put them there didn't sign yesterday and is apparently still looking around. Michigan State in particular.
The reality is the geography and competition will keep both from doing this well often or doing better... ever.