While I've nto used the specific equipment you speak of...
If you land is level or small slant type hill a zero turn is great, fantastic round trees, buildings, etc. I find mine faster than a traditional mower by far (on a residental lot with stuff to mow around about 1/2 the time of a BIGGER tractor!)
At the farm...the ground is a LOT less level..and the mowing is a lot more long straight aways - I found myself wanting a tractor. Has a kubota with a MMM and it was too big..hence the zero turn. When I got a bigger tractor I skipped the MMM for htat reason and got the zero for there...slopes were a bit of a PITA and the girl friend didn't like it. It was great for getting in/under/around things, fences, etc.
So this year we got a cheap lawn tractor and a rear mount 3Pt mower. ONly mowed twice so far and I LOVE it. Perfect? No, none of them are. For mowing along fence lines it's tough to get as close and not hit a post as the deck is bwhind you. I may adjust some to that. MUCH better 'ride' than a small mower/zero turn over rough yard/fence row, and much faster than the little tractor (ground speed for sure). And with 30hp the height of the grass is a non-issue!
At home I've had a toro timesaver I think it is, 25hp, 48" fab deck, $3200ish, for 150 hours now and it's been great. You can spend twice as much on a near/commercial machine..not sure one needs that unless you want a lifetime machine (figure they're designed to work 1000-1500 hours a year...vs a residential machine that is what, 25-50 / year). Mine mowes 2 acres in 90 minutes, about 15min faster if I push it a bit (not as comfy on the back and butt though)
And I can tell you it's DAMNED nice not have to crawl around on the ground and put the deck on/off!!