The Black RCA Phono turntable cable is a significant step up in performance from the Blue and comes with a separate earth link.
The construction looks very much the same as the RCA cable but if you put the RCA then phono RCA into your turntable you will soon hear which is meant to be there.
Audiophile Videophile Review
“absolutely worth the money"
Dr. Chumphol Musikanon, Audiophile / Videophile, Thailand July 15