Neithers that much mileage, it’s less than one service interval between the two!
What are the price differences? If the 58 with 35k is the same price as the older car with less miles go for the one with more miles.
If you run them like I do until their over ten years old then it makes a difference as at the ten year point things start getting more expensive like breakdown insurance for the car, if you buy a 58 plate you’ll have two years longer!
Besides which how often do you see a 58 plate? Pretty rare, as it was when the car market crashed and everyone was waiting for the Gov’t to bring in the tax incentives. there aren’t many 58 plates available 😉