It has already been mentioned that one is a delux, and the M is a basic.
From there it becomes a issue of what you are using it for?
1) Loader capacity and lift height?
2) Backhoe capacity and dumping height?
3) Three point lift capacity?
4) Physical size of the two and how that relates to the area you will be using it?
5) Finacial considerations between the two and buying one / paying one off
I'm doing general hobby farm tasks...trail maintenance, small tree removal, snow blowing, hoping to do small time hay production (20 to 30 acres seems feasible), throw in some food plots, put fencing, etc etc.
I was originally looking at the smaller sizes...3740 to 4030. Not much looked good in the used category. Making hay seemed borderline possible with that size. The m5100 seems to address some of this, although I'll need to get a sims cab and a blower, so the cost is creeping up again.
Before diving into it, I want to be sure I'm not losing too much...the m5100 looks like a nice, very capable tractor...loses a bit of strength to the 5040 on the back (2700 vs 2300 lbs).
The Comparison site that hodge linked to is nice, but it's hard for me to see how there is a $12,000 difference in the base price. Do you think that the 400 lbs is a big deal? Wll i eventually wish that I could have the mid pto? Other than that, Is it really just bells and whistles?
Twelve grand buys a lot of implements...
I guess you are talking about the tph lift capacity - the tractors weigh about the same. If you are haying, you are pulling stuff, not lifting it. I personally don't see an issue.
Both tractors are out of my category.
Also, what transmission do you want or are you most comfortable with? The L has the GST, while the MX has gear or HST, all very different animals to me depending on what you are doing.
I am biased. I have the MX4700HST and am very happy. I wanted simple with no electronic gadgetry to worry about because I will probably be using the tractor for 20+ years. Heck, I didn't even get the turbo of the MX5100. If I was making my living with it and/or getting a new tractor every 5 or six years I may have gone a different route.
I don't want to lie, and the prices have changed. Seems to me my dealer came in a grand or so under Kubota's website. That was for the tractor, loader, canopy and R4 tires. The jury is still out on the R4s - they do not care for mud. If I had it to do over....
I think you'll be happy with the tractor. That is what counts.