So, around here in north FLa, for 75-125hp machines; I would say it's clearly, #1 John Deere, #2: Kubota; #3: Massey; and #4: New Holland/Case. For Right of Way mowing (I mean roads/highways, not powerlines), I see same 1-3; farms, same deal; the one place I see New Holland seems to dominate is with the brush series tractors for powerline heavy mowing, with the special forestry package. Within 45 minutes of me, there is a Massey dealer that seems to be primarily sub 100hp; and another, about 1 hour NW, a primarily Ag Massey dealer.
For the smaller sub 60hp machines; I see a fair number of Masseys used as grading tractors, finish mowers (schools/parks).
When I was younger, it always seemed where I lived, the Clear #1 was Ford, then #2 was Massey, and #3/4 were far behind with John Deere and International/Case.