I'm not 100% sure on these, and I've done quite a bit of looking, but I'll tell you what I know. I believe they're the Wilshire fit, and to my knowledge, he hasn't worn the Alameda. But if the washes are the same, it would be very difficult to say, as everyone is built differently. I have the Wilshire and they fit me just like they fit him, so I believe that those are the fit that he's wearing. We have the same build, I'm just a little shorter than him. That was taken in Thailand while he was filming Only God Forgives. He definitely had his Altamont Wilshire in Stone Wash there, but it looks like he had a second grey pair of Altamont jeans. The ones in the photo you posted could be in Stone Wash as they can look very different depending on lighting, but I'm not sure they are. Here he is in Thailand wearing what I'm certain are the Altamont Wilshire in Stone Wash. Note how the rolled cuff has the same contrast as the one in the above photo:
Here's another photo from Thailand, but in this one you can see gold stitching on the fly, which the Stone Wash don't have:
And further, here's a picture in LA of another pair of Altamonts:
Here's a picture of a pair of jeans that I have that could be the same as one of the ones above. The ones in the link are Alameda, but mine are Wilshire. Otherwise they're the exact same.
You can see the gold stitching on the fly, but the regular stitching on the inseam just like his. The photo is an accurate representation on the color in person. A taupe/grey. I haven't washed them yet, but I have a feeling that the color will fade (especially if I don't wash them inside out) and that might be what happened to Gosling's pair.
It's also possible that they're the same jeans, (Wilshire Basic Overdye) but in Light Grey instead of Grey.
So, as I said, I can't give you a definitive answer. Let me know if you make any headway on this or if you have any other questions. Good luck!