Based on type/class a Sub compact and a compact are always out of each others class.
The BX is the only Sub compact in the listed tractors.
The classification SCUT CUT etc. are arbitrary. A tractor is a tractor. there are even 2 wheel tractors like BCS that are tractors you walk behind (I've got one and love it). I had a BX for years and now have a B2620. I bought the BX to have a riding mower that could do a little tractor work. I was amazed at how much tractor work it could do and decided I really wanted to do a lot more tractor work than I orginally thought on my 30 acres. As has been stated here and in other forums if mowing is what you do more of, especially around obstacles, the BX is your choice. I can mow with my B2620 but it was more fun on my BX. (sports car vs. station wagon) The biggest downside of the BX is when you are using 3PH attachments. The 3PH is very small on the BX and low to the ground. Some attachements don't work well on it. (you'll find posts on this challenge if you search) The B26XX has a more standard 3PH. It also has a lot of bonus features that make it worth the extra money. I suspect the originator of this thread will find the X to be a great choice for his needs. It was for me for 4 plus years.
LBrown59 you really need to expand your horizons. Get yourself another tractor that isn't a BX and you will find a new world and reasons to post thousnds more times.