I think the big difference is the loader attachment, the LX will be the remove from the seat and quick attach manifold like the 80 series BX vs the get off to drop the legs and 4 individual couplers. To me not much difference and I actually can do the re-install much faster on the old style. For some reason on my BX23S I had a tough time with the re-install after mowing compared to the B2650. Might just be me, but a lot of people had issues with that manifold leaking. I didn’t just was a pain to line back up. If you want the 33HP the LX all the way. My 2650 was a huge jump from the BX and I don’t do much more than brush hog in the summer and occasional snow blowing with the PTO so don’t need bigger. I do like the mower deck better as it seems to do a better job on the B. Tried a 72” but that scalped the lawn, the 60” does better. Good luck, either one will be a nice upgrade.