Are The 2017 Boys Freshman Sprint Class Faster Than 2014 Boys Freshman Sprint Class?

Marcellus Moore talks about competing with the upperclassman as only a freshman.

Some of the fastest sprint times in the country come from the underclassmen.  With young sprint studs like Sean Burrell, Marcellus Moore &  Cameron Mahorn are the 2017 freshman times faster than what they were in 2014, when the current seniors were freshman?