I am not sure which one is more powerful and better for singles. I have a ZF2 but I have a friend willing to swap his Ryuga 1 for my ZF2 but they are both 3u. I only want the more powerful one
Purely from power alone and ignoring anything else, I think ZF2 is still (slightly) more powerful than Ryuga 1 thanks to ZF2 compact head, I think.