I think I’ve figured it out. It’s cheaper if you transfer your entire token balance, bringing it to 0. I’ve always transferred just part of my balance. I did some testing and see that metamask suggests different gas limits in those two scenarios. So I’m pretty sure that explains it. That’s good info to have I guess. So, transferring part of your balance 2.3% more expensive, transferring all of it, 44% more expensive.