There have been several versions of Yabause released, including a currently work-in-progress core for RetroArch. There is also a Wii version, linked above; note that this is an unofficial release and support from the Yabause developers cannot be provided for it.
Yabause is not a very compatible emulator, even with the amount of development that has gone into it. It's sad, because compatibility notwithstanding, this emulator has many advantages over SSF. If you use the OpenGL video driver, you can render games in HD, unlike SSF which can only render in the game's native resolution. It's multi-platform and open-source, unlike SSF, which is closed-source and Windows-exclusive. SSF only lets you run games via mounted/burned disks, while Yabause lets you open ISO files as well as run burnt/mounted disks. The UI, despite not being perfect, is also better than SSF. Sadly, what matters is compatibility, and SSF is far ahead in that regard. For the pure end-user that has access to the Windows OS, SSF is recommended for games that don't work with Yabause. But due to the potential of Yabause and option for high resolution graphics, it's recommended for games that are compatible with it. It also has HLE bios.