I have both an 
L6060 and an MX5800.  They are both in the 60HP range but the 
L6060 is lighter with a smaller footprint.  I have R4's on both and don't notice any significant difference in pulling power.  A bigger difference might show up using R1's though.
The 
L6060 is an open station model.  I've had it for almost 2 years (450 hours) and have had no problems at all.
  
I have only two minor complaints.
1 - The small ROPS mounted toolbox (Missing if you have a cabbed model)  There is no convenient place to mount a larger one without interfering with work operations.  As a partial fix, I added a pair of these home made tool trays made from PVC pipe fittings:
View attachment 593274   View attachment 593275
A second set can be placed in either side of the FEL cross tube if desired.
2 - There is no fender handle on the right side since it conflicts with the fender mounted console for the FEL joystick. (Not an issue with a cabbed model) For me, this was awkward since I use the handle when mounting the tractor and to steady myself when mowing a slope.  The fix was to buy a right side handle from a MX5800 and mount it slightly out of alignment on the right fender:
View attachment 593279  View attachment 593280  View attachment 593281  View attachment 593282
Aside from these minor issues, I have no real complaints about the 
L6060 and would buy it again.