I have both. Played a month or two with the black but did not feel comfortable because its strokes feel rigid and stiff hurting my fingers after some minutes playing and getting tired after a while. I got the red one and only good experiences, it's smooth and sweet, very accurate and rock solid, 10/10. Daina tried both and she got the red for herself as well.
Both are good, black is better for typing or games like Starcraft imo since red is too sensitive.