I recommend you go to JD website and compare the two and you decide. Is there a difference, yes sir but is the difference worth the price point to you? We can all give an opinion, but it is just that. It is better you go through it line by line as they allow you to on JD's website and you can see the side-by-side comparison of each specification. If you don't understand the feature as a rep. what it does. There are several creature/operator comforts the M series has over the E series as well as some mechanical upgrades/options. JMHO. I'm not trying to push you one way or the other just think it best to make the most informed decision. Link to site comparison: JD Comparison of 5100E/5105MI’m trying to decide between 5E and 5M. I will mostly be using for hay mowing, baling and moving. Is the 5M really worth the extra $15-20k?