So, basically, in the pan, Stone looks like the matte version of Porcelain.
On the skin, I'd say Stone is a matte, SUPER light brown/putty color that is a teeeeensy bit darker than the original (and discontinued?) Trench. Porcelain is a shimmery flesh-toned color that's not quite peach, but not quite pink, but not quite champagne.
When they're wet, Stone looks almost identical to the original Almond, which I hear has been redone and is now an even more neutral brown than the warm-tinged original. Porcelain definitely amps up the champagne factor. I'm sure a lot of people have dupes or something similar in their collections already, but if you don't, or you're in the market for a high-end version, Porcelain will probably fit the bill.
|Stone; Porcelain. With flash, in indirect lighting.|
|Stone; Porcelain. Indirect lighting, no flash.|
|Stone on bottom; Porcelain on top. I just used the sponge-applicator, swiped four times. No flash.|
|Stone on bottom; Porcelain on top. With flash.|
|Stone; Porcelain. Applied wet.|
|Trench; Stone. Applied with sponge-tipped applicator and swiped four times.|
Once I actually get to play around with them on my eyes, I'll hopefully have something more insightful to say that vague color descriptions. :)