Originally Posted by The Big Kahuna
I used BLACK (or "Graphite" color as Yonex calls it).
According to Yonex Support: "In terms of playability and performance, two colors are the same. Material is polyester and 16L gauge (1.25mm). Advantage of this string is comfortable feel and reduces player fatigue."
Oh and thanks, I don't like black or yellow but I may do alright with 'Graphite'