Hi Titanic, I think I have been asked this before but here goes again. For one thing, my dealer talked me out of the 7500 stating that it was not a big enough step up from the BX. Since I had originally tried out a slightly used 7500 before the BX I decided it was to narrow and tippy and I did not like the ground contact mower deck either. So this time around, with the intention of keeping the BX at least for a while or forever even, I felt the 2410 was a better step. The 2410 is a larger tractor than the 7500, same wheelbase but larger none the less. It has larger tires, it has a wider stance, more clearence, more cubic inches, a few more horses--two more PTO horses, a bit more torque, more fuel capacity, more 3-point capacity, a nicer seat, cool fender flares, a closed out panel behind the seat, more capable FEL and position control (which is very nice). It still has the ground contact MMM however--oh well.
It was about 1,800 dollars I think over the 7500, since I did not price the 7500 this time and forget the price from the first time I cannot be exact for you and I rather prefer not to provide exact numbers.
As to the 4100, it is a nice unit and I am sure if you ask this question in the JD forum they can give you some good reasons for their purchases also. I think JD has a new model that will be a better match for the 2410--will I get it over a 2410 Kubota -- no--but that is me--I like Kubotas but many people will find it very attractive I am sure--to each his own reasons and opinions.
J