Hi, if you search the older threads someone did a good explanation a while ago - but it's something like this (bad rendition ) - mousse was the first version of this color, and the edging is (I believe) a darker gray/green - gris-vert is the following season, and although the bags are basically the same color leather, the trimming/edging on the gris-vert is more of a purple-y color. Again, this is from memory, so I would do a search, but hope this points in the right direction!
I have both the gris vert and the mousse. The gris vert is darker and has more of a greenish tinge plus the edging is almost a purple color. The mousse is lighter with more if a blue gray tone and the edging is the same hue of the bag but darker. If you like blue I would go with the mousse, and if you like a more greenish cast I would go with the gris vert. They are VERY close, but not identical. (I don't have a digital camera to use!)
I bought a mousse from NAP but the description just given by Beanie for Gris vert matches my mousse better than the one she gave for mousse!?! Maybe I actually have Gris Vert. Well, its a gorgeous bag anyway, and I love the silver hardware whichever it is.
I have the large front pocket paddy in gris-vert. Now I've just seen one in mousse and it looks light blue-ish/grey. So I was thinking of getting it. But I don't want to get it if it looks the same as my other one.
chicky and jag thanks for the photos, that helps. The two colors are a tad bit different but not enough to have the same bag in those colors. Thanks so much everybody for your help, I don't know what I would do without this place