The A10 is easier but not easy. You need to be watching the PLDs in any aircraft you are refueling. Don't focus on the boom. You can't use auto pilot with the A10C but you can use it with F15. It may not be realistic but it does give you one less axis to worry about.
It may be just me, but after the latest update, it seems that once the boom strikes the aircraft, even in a small way....BOOM! Both planes explode. That wasn't the case previously. It is most likely me, but I haven't had that issue before.