I will throw a new spin on things.
You already have a larger, heavier utility tractor that doesn't get used much.
You already believe that you will use a sub compact 5 times as much.
My question, given your small area, is a larger tractor SMALL enough to be handy?
I bought my MF1736 utility with only 40 hrs on it because the original owner has a 4 acre plot and said it was too big to be handy for him, so he wanted a sub compact. Yes, the bigger tractors have distinct advantages, but the small ones are often handy in tight spaces that a larger one is not. The SCUT will do nearly everything the larger utility will do, you just need to take smaller bites, so it will take longer on some jobs.