You don't have to take out the contacts...I was just pointing out they have a very different feel. I know a lot of people who like them.
I haven't ridden the 390 Boss, but I have ridden the 390 from a few years ago. The baseplate was a little stiffer than the Force but the straps were like marshmellow. Again, different flex and response with different parts of the bindings. I ride the Force because it has the feel and flex I prefer. Both are solid bindings, you really can't go wrong with either of them.