While Carlos Ortiz is the undisputed best PR lightweight of all time, these two battle it out for the 2nd spot... I think DeJesus takes Rosario apart. Outside of being a bigger puncher, I don't think Rosario had anything else over DeJesus (probably more explosive handspeed). DeJesus was a far more solid, composed technician, and had a better chin.
DeJesus too skillful and smooth. Rosario is one of my favorite fighters but Esteban at his best was the truth.