my wk came with 245 and it looks too small so I would go with that. i think all the technical differences are minimal.
the first number is the tread across the wheel or tread width.
so 10mm is less than half an inch not a big deal.
the next numbers are the sidewall as a % of the first number.
so 65% of 235 ....or 245.....that your sidewall height in inches.
so just based on looks I would go with the 245
TRY THIS CALCULATOR it will do the math for you
but I would THINK if you were just after mileage the skinnier tire would be better.