I think the biggest differences are the LX2620 has LED lights and a different trans that is quieter. However with my LX2610HSD (open station) I really only notice the trans whine when in high range. Since I only have 10 acres and am in the woods most of the time I'm 90% of the time in medium so for me it's not an issue. I think the real issue is the price what is the premium to get the -20 vs the -10. If it's not much more I would get the LX2620 but if you can save a good chunk of cash I saw nothing on the 20 series that made me want to upgrade. Now for the folks with the cab version the 20 series is the way to go because the whine is amplified inside the cab because of the confined space.