You can guess mine as well. I will say the 593 is a nice basic work tractor with ljust the basics. Some people love that fact, some don't. I got a chance to use a 492 tractor haying this year, an older version of the 596. I never liked these basic tractors, then I put some hours on one. That thing is kinda growing on me know. My first impression was wrong. It's really pretty comfy to operate & more nimble than it looked.
I think the NH is kinda the same as far as options, just a newer style to it. I haven't hear many complaints about it either.