The only difference between the chips is the 8086k is slightly faster out of the box, and it is a better binned chip so you have a better chance of getting a high overclock out of it. It does still have the crappy TIM though, so if you are looking for the highest overclock possible, you would still have to delid to get temperatures under control. Given the hefty price premium, it's probably not worth it, and you almost might be better off buying a binned 8700k off of Silicon Lottery instead if you really want a super high overclock.