XR3135HC vs. XR3037HC?

[Fallon]

Is the only difference between these 2 tractors the engine? Which one is better? I heard one has regens on every 5 hours, and the other every 40 or so. Any suggestions on what to look for when I'm comparing them? Most of the specs otherwise seem pretty much the same.

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[George2615]

Specs are pretty much the same. 3135 engine is by LS and regens about every 50 hours compared to every 5 on the 3037 Shibaura engine. 3135 dashboard display looks nicer than my 3037.