Cooper was faster and hit harder but Arreola seems to take a punch better. Cooper might finish it quickly but if he doesn't, Arreola takes over and pounds out a late stoppage. I'd lean towards Arreola but neither result would be a surprise
Cooper was nothing special, but Arreola is even less so. It's possible Arreola could outlast an out of shape Cooper, but if it's Cooper on one of those rare nights he was ready to fight, he pounds Arreola.