My dad has used a 1960ish 2wd MF Industrial 30 w/a FEL and a 6' bucket plowing snow here in upstate for ~15 years now, it has well worn R1's on it (or they might be R4's, I dunno), with loaded rears and wheel weights. last winter we found a set of chains for $150 and put them on, it makes worlds of difference on ice, before when he spun a little it turned to ice and he couldn't go anywhere, now it just goes.
on the other hand, my FIL has a pair of Kubotas, a B7810 with a FEL and unloaded R4s and fairly new (~100 hrs)
L3830 with loaded R1s on the rear, last winter we put a 6' rear blade on the
L3830 and it went though up to 10 or 15 inshes of snow (piles mainly) then the blade started pushing the nose around. the on the other hand B7810 would (in 6 or more inches of snow) go until it was maing a mound of snow out 3-4' from the FEL and then it would spin, with the 6' rear blade on it did ok, however then it was angled in more than 6" of snow it would push the nose around too much to make it usable.
to compare them: the B was good for getting in tight places around the house and such, however on the open driveway it didnt have the traction to clear more than 15' at a time, the L cant clear closer than 8" to a wall, but will go full bore all way otherwise.
comfort wise, the L wins hands down, the B is too small for me, I am always hitting the PTO lever or the quarter inching valve with my leg and I prefer the to drive the GST that the L has to the HST that the B has.
so I got lots of seat time in the
L3830 last year (also, my wife prefers to use the B7810 so it works for both of us)
Just my $0.02