No comparison!!!..Those devices do not block use of your phone while driving. They measure speeds, braking, etc... I used the Progressive device for one month and was given a report following my use. How many times I hit the brakes too hard, etc...
The proof is that Ford, GM, Chrysler, BMW, Ford Fleet, Enterprise, and many others have contacted ONCI.
ONCI owns the PATENTS. Read the patents and then you will understand.