"Phono" Cable - Necessary if you have RCA outs?

I have a VPI Aries/JMW 10.5 tonearm, which has RCA outs. I am using a .5 meter Kimber Silver Streak to connect to my CAT preamp. It seems to do OK, but my question is: are there any advantages to using a cable marketed as a "phono" cable, vs. using a standard set of interconnects? I see that most phono cables have the DIN connection, which I don't need, but some are also RCA at both ends. Any thoughts/experiences?