Also, if it matters to you, the 4010 is a TYM tractor with a Daedong(Kioti) engine...both Korean. If you don't know anything about either company, they make good stuff and put more emphasis on strength, power, and capacity than bells and whistles.
I believe the 4035 is a full-out Mahindra tractor, which I would also not be afraid of. If you look at the company, all the products they sell in a compact market are much heavier-duty than typical competitors.