Why? They are distinctly different, and unless I missed it, are copying none of the assets.

Are you merely referring to the fact that they both "scroll" the same way, a way which is not unique to the OPs website?

Be careful when calling people out.

The scrolling concept is the same, but the design isn't so much. Not any more than the Spotify site anyhow: http://www.spotify.com/uk/

I don't think so, it's pretty different. There are going to be certain commonalities between design sites.