Yeah I feel like this is the issue with this question, it's almost like comparing apples to oranges. Jhin has long range skill shots that can be easily missed, is immobile, doesn't benefit that much from life steal and possesses limited Auto-Attacks.
Draven is all about Catching and leading Axes. If he can keep them juggled and stay on the offensive he has one of the highest DPS in the game. However dropping your axes on Draven screws up damage output and doesn't allow him access to his spew/attack speed boost. He is also immobile but benefits greatly from life steal allowing to almost draintank if ahead.
They are both difficult in their own right and for totally different reasons.