Hi Cfavreau!
I think Adam explained this issue perfectly. As additional points of reference, I build ~1.1W single mode projectors all the time that consist of two 638nm single mode reds (or one 638nm combined with one 650nm), two 520nm single mode greens, and two 450nm single mode blues. The power generally works out to ~380mw of red (more if a 650nm is in the mix), 225mw of green, and ~500mw of blue. The results are beautiful. The colors are very well balanced and the drivers I use are excellent for precise low to full power lasing, but the cost in parts alone for such a module is US$1,150.
I'm not sure what's in that Kvant 1W module, but at 880 Euros, I would guess that you are looking at a single mode green, a corrected multimode blue and two single mode reds. Its really odd that they don't list the powers for RGB in their documentation, but if I'm right it will be lite on green. I would call them for more information. I've seen a similar module in the Clubmax 2000 which had a corrected multimode green and was quite impressed with it. The beam isn't as nice as single mode builds, but was still good. It was also very compact and easy to adjust the alignment.
You never mentioned what you plan on doing with the module. For graphics, you want the best beam possible, but for beam shows, you can generally get away with using corrected multimode diodes.
-David
"Help, help, I'm being repressed!"