These jeans were made out 98% cotton and 2% spandex so different than the jeans you have. I believe your slouchy skinnies have polyester in them (I tried them a while ago, but can't always wear polyester on my sensitive skin).
I tried the white jeans on really really quick yesterday. They didn't have my size and the size I did try on didn't look good at all...didn't look slouchy just looked ill fitting. I wish I could have tried on a size smaller to compare.
These were labeled classic skinny white jeans. They also had another pair that was labeled skinny jeans, but I'm not sure if they were thick or not. I just realized I didn't check to see if you could see the pockets through the fabric.
Hope that helps a bit - sorry I don't have more info.