Gastelum messed up his Face and gave him his hardest fight to date, and Romero turned him into a Point Fighter after the first exchange, as someone who also favors Izzy to win, this couldn't be farther from the truth. He's looked far from invincible, and while he's had some amazing performances, his Striking Defense is still very much in question when it comes to this Match up. His speed, and reaction time are going to be the determining factor on whether not he gets slept. Izzy has to be perfect until he gets the TKO through volume and precise shot selection, Jan just needs to perfect when he lands.
Izzy is sort of the rightful favorite in my opinion but Jan can ABSOLUTELY knock him the fuck out.