Here's one of the problems I see with any comparisons with Parish, or for that matter most of the players of that era: Most of the players had four years of college under their belt. So they were more mature and technically refined compared to today. With all these players coming out so young (previously high school, and now freshman or sophomore in college), they don't have the necessary skills, and most often neither the bodies to compete. Therefore they wallow on the bench for a few years, often times never making it. This is especially true for the five spot. Considering that Perk would have been a rookie this year if he had gone to four years of college, look at his numbers compared to Parish. Now I'm not suggesting that Perk is going to be another Parish. I doubt he ever will, but the point is that coming out early for a lot of these players hinders their development. So instead of looking at their break-out year being when they are 24, they are often viewed as washed up and has-beens by the time they're 25.
The bottom line with O'Bryant is that he has a greater skill set than Perk. He has a head on his shoulders. The only thing that will keep him from succeeding in this league now with this chance with the Cs (beyond injury) is his work ethic. If he works, he'll have a long career. If not, he'll be changing tires at Discount Tire Center.