Before buying either I would spend some time watching some of the videos of the coaches here using each. I think even with an essential membership you will be able to see several examples. Also, if i remember correctly, CRev has a trial period (it's been a while since I purchased) and you can get a free (turn/river) version of PIO to try as well. I actually tired typing out some explanations a few times but it felt like it was going to take me way too long to type up something that wouldn't give you near as much knowledge as seeing it for yourself. I apologize that my answer isn't what you were looking for but I think it's a good recommendation.

thanks bro appreciate it