Size comparison: Pan-Leica 100-400/4-6.3 vs Olympus 40-150/2.8

43rumors reader Smart sent me this image comparison between the Leica and the Canon lens.

43rumors reader Erlend sent me this:

I just compared the size of these lenses from your last photo and the 4/3 lens simulator. I have not seen the spec. of the 100-400 yet so until that is available it could be fun to make a poll on the 43 Rumors web site and ask what lens the readers believe is larger from flange to front.

To me it clearly looks like the Olympus has a larger flange…