Judging by time issues..ROTJ is less painting.
Well, they both in essence have same main colors...diff ear cap colors though. But, ROTJ, as far as painting the battle damage, it's 99% silver battle damage.
But, I'm more toward ESB.
I did my SGT Fang helm main painting in a matter of a few hours from scratch. Give or take another couple hours of hand painting any other details. And that was doing the ESB sytle, I do have another thread of what the helm looks like, have to take the finished pics as soon as I get the decals on it.