Here we go again...
Winning a world title is NOT the epitome of success in our sport. Winning an Olympic gold medal is the epitome of success in wrestling.
Logan missed making the Olympic Team in 2016. Then he entered a "consolation" world championships that same year where he won the 61 kg category. That is nowhere near the same as David's 2018 world championship which was won at an Olympic weight in a year where every country could send one rep per weight.
Also, if we are looking at college careers, yes, Logan won four titles to David's two. But David only lost 3 matches, to Bubba Jenkins and Kyle Dake twice, whereas Logan lost to Jarrod Patterson, Jason Lara, Frank Perrelli, Chris Dardanes, Jordan Oliver, and Zain Retherford. If we are going purely on accomplishments, then Logan was superior collegiate wrestler. But if we are going off of the eyeball test, I would argue that David was superior as he faced better competition and was more dominant.