The 5E and M60 are main competitors to one another. It's like Mustang vs Camaro. It's easy to see when you go look at them. A 5075E is the M7060's main competitor and vice versa. I believe the M4-71 is an upscaled M7060, that has a few extra niceities and features, but at their core they are pretty much the same machine. I believe the reason JD introduced the 5075E Premium Cab was to counter Kubota introducing the M4-71. In 18 I look at both, and prefer certain things about each over the other, but honestly do you like Silverado 1500's or F150? Either will do the same job as the other pretty much just as well. I ultimately went with the 5075E, and have been very happy with it at around 350 hour. If I had gone with the M7060 I likely would be making the same claim though.
If you want me to list off my opinions, and/of things I prefer about one over the other I can, but I don't want this to turn into a big argument. Tractor brand loyal can be just like car/truck/chainsaw/etc loyalty, and has the potential to become an argument. Again both are excellent, very competitive with the other, and both are made to compete with each other more than any other models on the market. When you look at options, features, specs, size, price, etc it's plain to see that they just are.