Best, most scientific, review I've seen.
Despite the fact the new Leica comes out on top, this is on the basis of better range finding functionality, so I'm going for the Swarovskis, which edge them on optical performance especially light gathering.
For some reason the Leicas are £2700 in the UK with the Swarovskis coming in at £2225. In the US the Leicas are $2995 (£1800) while the Swarovskis are more expensive at $3179 (£1909).
I'm in Austria in a couple of weeks, does anyone know if there is an opportunity to get them for a good price over there?