I am purchasing a tractor to perform all aspects of hay operation, to renovate hay land and also to run a Berry harvester.
Is there any advantage to the M series over the Limited other than comfort and convenience? Will the M do the job better in any way or just more conveniently?
As AKfish and MWRR pointed out, there are some significant differences.
Technically, MattLynch is correct, it is the same
basic engine, but different engine controls and performance. For example, the M's maximum PTO hp is reached at 2100 rpm, not the 2400 rpm that the E requires. More power at lower rpm = more torque, less fuel, longer engine life, etc, etc.
And, yes, you are paying more for comfort and convenience, but IMHO it's worth it. A few thousand dollars, spread out over the expected life of the tractor, is not a whole lot. If we ever get out of this drought situation, I will spend about 300 hours each year in the tractor seat, just in the hay fields. Is comfort and convenience important to me? You bet.
I went through this same decision process about a 18 months ago. AKfish did it more recently. He has some long, in-depth, posts about his decision. Just look for the "Find all threads started by" under his username. I think it would be a good read for you.