The only reason I’d pick different UY is if expecting to book Poly points in the MAR UY banking window more often than not.
Unless the plan is regularly staying Nov-Feb, I’d definitely match UY.
It’s one of the advantages of buying direct too. Resale can be a pain trying to find the right contract/size/UY. Sometimes means passing up better deals to get closer to what you want. Direct is made to order. If you want 110pts in March UY, fine. Their default is to match your existing UY. No fuss. No searching. Just choosing which incentive round and how many points works best for you.