I don't know about the door size. I have a DE0061T it's a great unit, keeps my food cold and the frozen foods stay frozen. It doesn't draw much DC current (< 3 amps) either for a 7 cubic foot frig/ freezer, I do know that you need to pay attention to the depth of the DE0061T because the fan and compressor assembly are mounted high and to the left if your looking at the front of the unit. I ended up taking some of the Aluminum off the bracket that held the assembly in place on the unit. Yup I know it would have voided the warranty had I had a warranty issue. I've had no issues since 2006-07 when the frig was upgraded.
I'll see which unit I originally had in my boat because the frig is still working in a slip neighbors boat who I gave my old Norcold unit to.
Bill