Read the report! Page 11 for an overview.
I read it, and that was my point: the Imaging Systems Business Unit accounts for only 39% of the revenue that you quote of Canon, whereas "Imaging Products" are 74% of Nikon's revenues, and Canon's "Imaging" unit is more diverse, with things like printers, camcorders and broadcast equipment that Nikon does not have. So the total company-wide revenue numbers you headlined are useless as a comparison of the "system camera bodies and lenses" sector that we are discussing. As to technology sharing, surely a better way to measure the benefits of that it to look at the consequences as indicated by sales, revenues and such for the product sector we are discussing, not saying "this company is bigger and and more diversified". After all, by that corporate-wide net sales measure, the ranking is:
Samsung > Sony, Panasonic (roughly a tie, each twice as big as Canon) > Canon > Nikon.
The fact that Samsung Electronics is a giant due to its diverse strengths in areas like big screen TV's and mobile phones (not to mention the washing machines and refrigerators and ship-bulding etc. of other divisions of Samsung) does not tell me much about its prospects in system cameras.
Samsung gross profit 2013: $70,550,000,000