Yep.....get the cable that goes with the transmission. Since 948's and 1098's had the smoothcase, their cable is different from the 1275 with the ribcase. You have a ribcase, so get the 1275 cable (this would hold true even if you had a 948 with a ribcase).
I honestly have no idea what the difference is between the two, but again.....get the part that matches your transmission.