This is neither the Bridge nor the Camera Raw Forum.
Apart from that posting a few screenshots might help illustrate what is going on.
If you have embedded thumbnails selected in Bridge the image you see in the preveiw window is a jpeg from the camera thumbnail. When you open in ACR you are seeing them as edited in camera raw. You need to adjust settngs there and create your own default to suit your tastes. Camera Raw is just that - raw or like a negative.