I have a TN75DA (cab)
I ran a kubota 9000 (something) series (90hp) for a few days last fall.
The NH has better ergonomics, it's a more comfortable, better set up tractor inside. The Kubota had a LOT of power (it should at 90hp) but it wasn't as nice inside.
I think kubota's are super reliable, but I think they are sized small inside for ummm, big guys like me.
I really love my TN. I had it on the dyno, it made 69 PTO hp. (more than rated), thing is a beast, and yet it's super comfy inside and controls just come to hand.
I realize that doesn't help, but it's at least a data point.