I don't think it looks much the same, and the code doesn't look similar either… I was going to compare some of the CSS class names, but can't even find components that are the same. The demos have different structure, and the components are different in style.

The only real similarities I could spot are the use of "Statistics and more" at the top, and a similar background.

Other than that you are both just using similar things that all admin panels themes have.

You use d3, he uses flot.

You use backbone, he doesn't.

In fact, not sure there is much in common at all.

Do you have any specific examples?