According to their about page, that site is using this algorithm http://arxiv.org/pdf/1508.06576.pdf http://arxiv.org/pdf/1508.06576.pdf whereas neural-image-an

According to their about page, that site is using this algorithm http://arxiv.org/pdf/1508.06576.pdf http://arxiv.org/pdf/1508.06576.pdf whereas neural-image-analogies is a combination of http://www.mrl.nyu.edu/projects/image-analogies/index.html http://www.mrl.nyu.edu/projects/image-analogies/index.html and http://arxiv.org/pdf/1601.04589v1.pdf http://arxiv.org/pdf/1601.04589v1.pdf Basically you can do a few other things with image analogies, such as texture-by-numbers, that the neural style algo doesn't cover. In addition, the matching and blending covered in the Li and Wand paper provides more accurate style details.