These seem like radically different cameras in my opinion. Ok, maybe not radically but the Hassy is an ultra panoramic with a limited range of lenses whereas the Bessa is basically a standard 35mm rangefinder that accepts nearly a century of lenses.
Personally, the Hasselblad seems like a lot of fun, but for a practical 24x36mm I"d go for a Bessa. I think you could however do some very interesting street photography with the Xpan.
edit: Isn't there a substantial price difference as well?