Yep, all the same. So now you finally know what that small arm pocket with zipper on your leathers was for; your flexi-friend 
Not in France they aren't.
Cars and light vans are Class 1. Motorcycles are Class 5.
Whilst bikes are not half price, they are cheaper. Boulogne to Abbeville North on the A16 costs €7.30 for a car and €4.60 for a bike. Corresponding rates A13 to Alencon, €15.00 and €9.50
Note that using the credit card only lane will result in you being charged the full Class 1 rate. So if you are on a bike, choose a booth with an operator.