Below are some difference between Oreck commercial U2000R-1 and 2100RHS:
Oreck XL 2100RHS vs U2000R-1
This is one of the key difference.
The Oreck U2000R-1 has a Rear Carry Handle that the 2100RHS does not have.
The U2000R-1 has 40 feet pigtail cord while the 2100RHS has a 35 feet standard cord.
Outer Bag Size
The U2000R-1 has a larger outer bag.
Color: Red vs Blue
As you can see from the images, the U2000R-1 is Red whereas the XL 2100RHS is Blue.
The retail price of Oreck U2000R-1 is about $20 more expensive than the XL 2100RHS.
If you know other difference between Oreck XL 2100RHS and U2000R-1, please share below.