Joshua hasn't shown any major chin issues til now so that's inconclusive. What is readily apparent however is that Bowe was a human heavy bag.
which bowe ? bowe only had a 2 year peak which centered around holyfield. that bowe beats joshua / galota bowe does not.
The peak version of bowe would box Joshuas head off much better movement and speed .its too early to say how good josh will become could be the next big thing at HW. that fighter if he appears might be to much for bowe to handle .will shall see .if he keeps getting bigger the ring may collapse .