Part of the reason for this may be that the bissell uses a large brush roll where the rug doctor uses a vibrating brush bar.
Bissell big green vs rug doctor deep clean.
Rug doctor vac offers a lighter body that weighs almost twice less 25 pounds and comes with a longer 28 ft cord.
In all those tests the bissell big green is shown to clean slightly better than the rug doctor.
If you are looking for the stronger carpet cleaning performance of the two models it is a clear win for the big green.
Which deep carpet vacuum is more maneuverable.
The big green is more comparable in size and functions to the larger rug doctor called the mighty pro x3.
The rug doctor is a smaller and lighter carpet cleaner than the bissell.
Click here for that comparison.