I have both the Hitachi and the original Fairy wand. Honestly, I like the Fairy so much better than the Hitachi because of the dial control for the speeds.
The Hitachi only has two settings and I find both settings too painful to attempt to use it without panties or a Tenga Egg over it.
The Fairy goes from just kind of a tickle all the way up to holysmokesomgthere'saj ackhammeronmycrotch! Plus the head on the Fairy is smooth and not rough like the Hitachi so I haven't had any issues with friction burn or torn skin with the Fairy. O.o