B2601 and CK2610 are not apples to apples. Kioti CK2510 HST is the more comparable machine. Even still, CK2510 somewhere between B2601 and LX2610 in capabilities (depends on the feature measured).
FWIW, I wouldn't do B2601 for 10 acres. Search and find (and wait if needed) for a LX2610 Kubota. More $, but a much more stable, versatile machine for mowing and landscaping tasks that'll take a step up in rear attachment width but also light enough for most mowing and fits in tighter places. The Kioti CK2610 you'd think is comparable but it's FAR more stable tractor than the Kubota B2601 or LX2610 in weight and FEL capability and a nice if you add dealer option of rear remotes relatively cheaply vs Kubota's similar hydraulic options for future expansion (top and tilt, etc.), but the trade-off is weight and more width so not as good for "finish mowing" duty. Compare that to the CK2510HST and CK2610HST machines with test drives and to see if the dealer is a fit for you as well (are they focused all on skid steer /construction equipment and don't care much about hobby farmers for example is a trend in the business). Confused by now with all these overlapping numbers? ;-) Just think HST versions B2601, CK2510, LX2610,CK2610 as walking up the ladder (except when one feature doesn't like transmission choices like shuttle shift on bigger Kioti or FEL or lesser options the brands tout to compete vs. each other.)
And FWIW again, I much prefer rear mount finish mower for mowing vs belly mowers that are finicky things long term. You can buy BOTH a good finish mower and a medium duty bush hog for the price of belly mower and mounting bracket/finicky lift hardware and have a LOT more capability. A zero turn mower is the ideal choice for mowing vs. a tractor at the end of the day (faster, cheaper to run). Ideally get a basic bush hog and zero turn so you can get the rough spots cleaned up, then zero turn mow from then on.