RJ's frame is longer than Brevin's but they can do a lot of the same things in the passing game. I'd say RJ might be even more of a vertical threat while Brevin is probably craftier and quicker in and out of breaks. RJ's phenomenal at high pointing a ball for a kid his age with his experience. Quinn loves to throw endzone corner routes to RJ and it's unstoppable.... he is too fast, fluid in his break, and goes up and gets it seemingly EVERY time. Brevin is a tough guy, a natural bully after the catch - I'd like to see RJ get some of that mentality in his game this year.
The big difference is that Brevin was at least a capable guy blocking with the big guys when asked. That will be something RJ has to develop. He's willing, just not as naturally thick as Brevin. I doubt it will ever be his forte, but the way TEs have turned into jumbo WRs these days, who cares.