Not sure I follow ya on how the front wheels don't pivot like a Kubota.
FWIW, Just did a quick google of this model. It's actually a Husqvarna Group prodcut and it's got HydroGear ZT3100 integrated drives. Most, if not all of the high-end residential units have gone this route, starting about 4yrs ago. These drives are fully serviceable, with each having it's own little spin-on oil filter.
Having owned a ZTR, I didn't like lap-bar control near as much as I thought I would. In fact, I hated it. My arms/hands would go numb, and try to swat that bug biting you in the face? HANG ON.. WHEEEEEE!