you know in a way I trust Wesker more. not elaborating on that point but anyway if we're comparing them...
i feel like it's more methodical with Wesker. He's a busy man, so the time he does set aside for you shouldn't be wasted. He prefers to plan sessions out. Though I'm sure you can still find a way to get his attention on you if you're that needy. Trust you will be dealt with afterward for distracting him from his to-do list for the day.
krauser is holed up in Spain with fuck all to do except menial labor for Saddler and brooding over his long lost twink (Leon). And practicing knife tricks. You wanna see a knife trick? Hold still.
I don’t think either one of them is particularly gentle with you. Maybe Wesker has a steadier pace and is more openly paying attention to you. He makes you tell him how good it feels and how you want it, where you want it, etc. I think Wesker is a little bit better with aftercare, too. He isn't winning any gold stars, but he does make sure that you're physically fine afterwards and not too upset or anything.
Not to say that Krauser is inattentive. I mean, a little bit. It’s more like he’s taking an internal note of all your reactions and making sure you aren’t totally not into it. Possibly an ego thing to make you feel good. Feel better than any other guy could make you feel and all that. blah blah. aftercare leaves more to be desired, I think.
I have more thoughts on Krauser and while I think he’s for sure the more dominant one during sex… at the end of the day he’s used to following orders. even if you arent giving him any and are letting him do most of the work (seldom does he let you take control)... I can't put it to words properly grrrrrr I think he does look for some validation from you. he will never ever tell you that, assuming it ever slips his subconscious into his conscious mind and he realizes such.
anyway yeah I think he uses that knife a little too loosely. what, you don't trust him to not accidentally cut you? no look he'll show you how good with it he is, just don't make any sudden movements. or do, that's also fun.