Expect the same maybe even quicker. If Joshua will choose to box it will be worse, if Joshua loose too much weight he will be vunerable to Ruiz's punches, so pretty much a no win scenario for Joshua. The first fight showed his limitations and showed that his gold medal at summer Olympics was a gift. Ruiz Jr never acomplished such heights but he still managed to rattle and break down Joshua with his amateur and pro experience and skills of course. Rematch will depend on same thing as the first fight, on chin, hand speed and power.
Joshua was boxing pretty well for the first 3 rounds until he got carried away going for the stoppage, he never recovered from his first knockdown. I think he'll box smarter in the rematch and avenge the loss, i'll be supporting Ruiz tho.
I'll bet Joshua KO but with very little confidence - maybe 60% if he comes in with a very different attitude. But as mentioned above, I can see a scenario where he gets chinned, again
AJ is mentally shot......Ruiz walked thru his biggest shots and only went down in a flash knock down.......and hurt him every time in return he laid gloves on him including a busted nose. He does not fight tall, never has, he is a hooker or up close upper cut type of fighter and you aint teaching this old dog new tricks......he always will be stiff with zero head movement especially when charting in rough waters again and Ruiz will make sure it is going rough waters. His jab is weak with no snap......his stamina will never improve when pressed and Ruiz is going to press again and make him fight. Eventually AJ will hook with Ruiz again because that is all he knows......once he gets hit he will fall apart again........and he is looking for a way out to quit again.