I've worked with several OHSU grads and they are incredibly competent clinically. If money is no issue, then I could see going to UoP for their strong clinical training and expedited program. However, tuition was a large factor in my decision to choose OHSU over other schools. They start you in clinic very early in comparison to other schools, there is a large patient base in portland, and the clinic and sim labs will be brand new in our 2nd year. UoP will be moving to a new building in the same year, so no matter what school you choose there will be a transition into a new building.
Plus, if you want to practice in Oregon ultimately, 70% of dentists in Oregon are OHSU grads. Existing dentists in Oregon seem to be more likely to sell their practice to or bring on an associate from OHSU.
Ultimately, if money is no issue, go with your gut. Either option will prepare you to be a fantastic clinical dentist.