7120 v's 9770
30 more horse power
.91m2 more cleaning area
Larger seperation area
Concaves or modules are a lot easier to remove / replace - no need for hard thresh kits or different seperation set-ups for most crops in most conditions
Self levelling cleaning system standard
CVT rotor drive with reverser
Less drive components - chains / belts / grease points
Less wear points with transition cone compared to F.A.S.T system
15 bushel larger grain tank
3.2 bushel Case IH to John Deere 3.3 bushel - JD .1 of a bushel faster compared to 15 bushel more capacity - of course it would feel they take longer to unload
Headland system to slow hydraulic driven fan down on turns to limit grain loss
One console with all the information you need at your finger tips
Extenda Wear threshing, seperating and unloading components - not sure on Deere
These are a few things off the top of my head. Interesting to hear other peoples thoughts.
They are a totally different class of machine with their drive system and probably are a little more expensive at list.
A more accurate comparison can be made between a 7088 and a 9770 (both belt drive) - but hp, seperation and cleaning systems are speced larger on the 7088.