Wow, you're good.
I'm quite OK at DRL, but for some reason I'm horrible at JH.
Same. Things seem to hit much more precisely, and when encounters happen, it is hard to get into cover without taking hits (compared to DRL where you hit the run button then zig-zag your way to cover). Limited inventory and the inability to stock up on guns, ammo, and health packs make JH a much different game than DRL.
Mind you, this isn't a statement of whether it is better or not -- it's just different.
If anything, JH plays much closer to ARL, and I am terrible at that game, never having won a single one before.