Ventrac versus traditional tractor and bush hog

We have pasture land that needs bush hogging each year but I would really rather have a machine with front end mower instead of rear end attachment. Has anyone compared using a Ventrac 4000 model with tough cut mower versus a traditional tractor pulling a 5 or 6 foot bush hog. We have some slopes to be mowed, and the fields are really just tall grass and weeds, not really any heavy brush. Curious as to which cuts better and is one any quicker than the other.

Thanks

Ventrac versus traditional tractor and bush hog