Did some searching on the John Deere 1023E and 1026R; outlined below are some of the differences in the two models:
1026R
Engine: 3TNV79 (looks like they removed a shim in the injector pump to increase the power/fuel delivery rate as all else is the same as the engine in the 2305)
Position Control
Folding ROPS (there is an optional folding ROPS for both models)
Suspension Seat
Swivel Seat (option on both models)
Standard Seat is high back, w/arm rests (looks like it may be reclining)
Fuel tank is now integrated into the left fender (same on both models)
1023E
Engine: 3TNM72
No Suspension Seat
No Position Control
Folding ROPS (there is an optional folding ROPS for both models)
Swivel Seat (option on both models)
Low back Seat
Both the 1023E and 1026 R have Oil Coolers, the dreaded fan is gone!!
Here is a link to the parts catlog;
http://jdpc.deere.com/jdpc/servlet/c...ageServlet_Alt
Look in the Sectional Index under 90-Lables & Optional Equipment; you will see the information on the position control, just look at the decals.
For those not familiar with John Deere parts catalog, in Model Search just type in 1023 or 1026 and select.
Hope this helps!
OldMan