Or we can just stop with this creepy obsession over the size of the female characters' breasts. Think about it, "outrage" over the female characters' chests not being big enough. @__@
Or just open a dedicated thread for it and spare everyone else.
Okay, you people got to be kidding at this point. XD
Seriously, in one image Kasumi's upper body is facing us, in the other we see it in profile. Let me tell you as an artist, who has drawn female bodies from all sorts of angles, who drew them from actual female models in front of him: From some angles breasts seem more pronounced than in others. Breasts in profile break out of the character outline and seem bigger, breasts seen from the front don't break out of the character outline and thus seem smaller.
That is the reason why the two pictures that sparked the specualtion of bigger breasts both showed Helena and Kasumi from the side.
Last but not least, the image used in that comparison is not a new, Japanese version, it too was part of the batch of E3 reveal pictures:
Available since June 11th here:
http://www.gamersyde.com/game_images_4087_en.html
We long knew this image, and everyone was still complaining the breasts were too small. Now people have looked a little closer at the old footage and suddenly Kasumi's chest is big enough, thus this must be a new, Japanese version. @__@