The standard cab model is the B3000HSDC, and the deluxe cab model is the B3000HSDCC, with a cold weather cab. Differences in standard equipment that I found are:
- 60 amp alternator instead of 40 amp
- Adjustable Seat Suspension
- Seat with Arm Rests
- 3 Pt. Lower extendible links
- Ratchet right link
- Rear Defogger with 60A Alternator
- Rear Wiper
This is according to the quotes from the Build My Kubota pages.
The Features PDF file and the Specifications file also mention position control on the B3000HSDCC and quarter inching valve on the B3000HSDC. Hope this helps.