If your Cypbershaft only supports 50 ohm output I’d suggest getting the semi-rigid 50 ohm cable from Cybershaft. It’s definitely the best value for money of the available ones. The Sound Warrior can be switched to 50 ohm input.
I currently have an OP20A, the Vivaldi clock and two Sound Warrior word clocks in my system. I’ve been switching back and forth between the Vivaldi clock and the Sound Warrors every week or two for comparison purposes. No definitve conclusion yet but I can at least say that in my system the difference is subtle.
The Sound Warrior is specifically recommended by Hasegawa-san as he’s tested it and confirmed it’s able to maintain the performance of his clocks at the outputs. The DDS approach used in these is totally differnent than the PLL used in the Vivaldi clock and has some distinct advantages for converting a high accuracy word clock input. On the other hand the Vivaldi clock was designed specifically for use with the Vivaldi and has some interesting features like dither, plus it looks a lot nicer