Oh, come on! Kang fights Thor like dudes without prep in a regular basis, took over Marvel 616 by being a good sport and not cheating by time travelling (like he totally could in a KMC match), has done every single time-travel feat there is to do, has an empire spawning in several time-lines and realities. He had a cosmic cube lying around in the last GoTG.
What has Rip ever done to ever justify to be put in the same sentence of this magnificent conqueror? Writing in a chalk-board? Geez!
No, I just mean this is still a battle. They prep and then they battle. Kang is both, a hell of a prepper and a capable fighter. What does Rip brings to the table that can topple Kang's efforts?
He beat the whole 616 Earth, he stopped Alioth and the Magus, both multiversal threats on themselves. He killed the most versed time-beings in all Marvel in straight combat and foiled their plans. He has tech that Surfer, Galactus and Dr. Strange couldn't detect. But most of all he has a bunch of concrete feats to back up his hype.
Kang stopped a guy eating the multiverse already, he also stopped two mayor time wrecks that would deform the multiverse forever against the Time Keepers and the Magus.
He also holds his ground (survives) against Warrior Madness Thor in single combat.
Like I said, they are both pretty much equal in that they are masters of time. Rip Hunter also helped defeat Gog from Kingdom. Someone who is ALSO a time traveler. He's one of the ONLY survivors of the Pre-Crisis history and knows more about time than the Linear Men.
Just because Kang has done that same thing, doesn't necessarily make him the winner. And vice versa.
BUT, Kang has waaaaaaaaaay more combat feats. Way more scans of his abilities. The burden of proof is on you to prove that Rip can match him, we are not to suppose he will do as well as Kang without feats to back it up. Right?
I have yet to be convinced that Kang could do the same to Rip hunter. Someone who is a master of time and has faced beings GREATER than Kang. I said Rip can take Kang, but I didn't say he would get the majority. It's more of a toss up, IMO.