Maybe that's what they mean.
I'm pissed with my JD 1025R and am entertaining either a 2025 or a Kubota.  The tractor company I bought the JD from handles both JD and Kubota, but Kubota is way over in Orange, Va.  Might be able to make a deal though.
Don't like the BX because of the underneath hydraulic cooling fan.  With my use of it, I'm sure that I'd bust that cooling fan.
Had a JD 4010 which had an 18.5 hp diesel, more of less equivalent to a JD 2019E IF they made such.  It provided great service and was completely adequate on hp.  The drive line flex coupling busted about the time I was ready to trade for a new one anyway.
Does the B series have that ridiculous underfoot fuel filter that's on the BX series and the JD 1 series (maybe 2 as well; not sure)?  Noticed the B series has the "inching" 3PH control, which I love on my JD 1025R.  The 1025R also has a gentle start on the PTO.  The abrupt start on the 4010's is probably what broke the drive coupler.
Ralph