They are different products. The Supreme Slider is meant for free motion quilting and extends all around the needle area of the sewing machine. The Betty Bridge just extends from the sewing machine bed toward you for a little ways. If your machine is recessed into a table, there is usually a small gap in height between the sewing machine bed and the table or the table insert, and when you're piecing the seams often get flipped because of this. I have started putting a piece of painter's tape across that area to eliminate the problem, but thanks to you I know now about the Betty Bridge and may try that instead. (I suspect that the tape does just as good a job - but it has to be stuck on and off every time I clean the machine or change the bobbin, and a wider bridge would probably do a better job.)