E-ZPass interior or Bumper Mount

I'm going to apply for my Pennsylvania EZPass but they asked whether you want a Bumper Mount or an interior mount.

All of the trucks I ever drove had a velcro strip inside of them that had the EZ Pass on it.

Is that still how they mount? Is there an advantage to a bumper mount?

 

I am looking to stay in the Northeast.

Now I have been investigating getting EZ passes in different states.

Pennsylvania is one of the few States that if a resident buys their EZ Pass they only get the same discount as anyone from any other state with an E-ZPass.

I have to check on commercial vehicles, but if you purchase an EZ Pass from the state of New Jersey, you get a discount on New Jersey Bridges apparently that you would not get if you had a Pennsylvania EZ Pass.

Yet you get the same discount as a Pennsylvania EZ Pass in Pa.

I will be looking further into this.

 

Does anyone know if New Jersey E-ZPass offers commercial trucks a discount for the turnpike or the bridges beyond what any EZ Pass from another state would give?

The information on their website is very confusing, they offer a whole bunch of different plans, and of course they have no phone number to contact them.