Jacare is far more focused on MMA than Roger. Jacare is training with Extreme Couture While I believe Roer does some training with Renzo at hs academy before his fights but not much.
Also grappling wise the HW divison with Werdum, Nogueira, Fedor, Barnett, Gonzaga, Monson, and Pe de Pano is loaded even if Roger is better than all of them grappling they are all world class while the MW divison has a few guys Almedia, Maia, but outside of that no real world class grapplers.
I see Jacare being a top 5 MW in the world. And if he can get to the UFC before another prospect named Jake Rosholt I think he has a shot to be #1 for a while before Rosholt who is considered the best MMA prospect in MMA's short history.