Leica M9 – 1/125 at f / 2.0, ISO 160
Canon 5D Mark II – 1/125 at f / 1.8, ISO 100
Leica M9 – 1/125 at f / 2.0, ISO 320
Canon 5D Mark II – 1/125 at f / 1.6, ISO 250
Leica M9 with the Summilux M 35 pre-asph gives that special Leica glow especially around the highlights and high contrast borders. Downside is the horrible coma effect around the point light sources which are absent from the Canon lens. Amazing what difference 20 + years of lens development makes. Your preference?
February 7th 2012 Update: 100% Crops
Here are some 100% crops of the above images:
Leica M9 – 1/125 at f / 2.0, ISO 320
Canon 5D Mark II – 1/125 at f / 1.6, ISO 250
Adventures in Photography 
Are you kidding me? They are very nearly identical. I think you’re talking about a .01% difference, and you should consider a career in diamond grading. Just sayin’…
Thanks for sharing!
Thanks for the nice comments. I like the photos on your flickr page – I’ve always wanted to see the northern lights.