To your initial question, the technical term I've seen used is "Limited Cat 1". It is a "Category 1" hitch in that it uses the full sized pins, connectors, lynch pins, and arms. A Category 0 hitch uses smaller mounting points. It is "Limited" because of its not spreading quite as much as, say, a B-series tractor and because it can't lift things quite as high.
As others have said, there are many different lines of "sub-compact" attachments from Woods, TSC, and LandPride, to name a few. You won't have any problem finding the properly sized attachments for your BX.
To your other question, that is a matter of what you're going to do with it.
If you are mowing your grass, moving mulch, moving dirt, and doing "normal" things with your tractor, you won't get much benefit from the slightly larger frame, slightly larger tires, and slightly higher capacities that a
BX2360 offers.
If you plan on doing a bunch of tilling, buying a
chipper, buying a PTO generator, attaching a Woods Backhoe, going through the woods, or otherwise have a deep desire for a little more horsepower, a little more ground clearence, or a little more length, then go ahead and get a
BX2360.
The rule of thumb with these tractors is that you'll run out of traction before you run out of power. I do, however, have a neighbor that has an 1860 and when he saw my
BX2230 (older generation akin to
BX2360) with backhoe attached (making the
BX24 it's closest relative), he immediately had buyers regret and wished he had made the bump to the larger tractor. And I have to say that I've NEVER regretted getting the larger of the BX line of machines...nor have I wished I had gotten the smaller.
That said, I have a close friend on 10 acres that has a
BX1850 who is as happy as a clam. Has zero desire for more horsepower or size and his tractor does everything he wants it to do. The
BX1860 is a very capable and desireable machine.
Clear as mud, but the real answer lies in what you want to use the machine for and how you feel about putting another $2k into the mix.