You didn't come up with the idea of a heatmap. Their designs are different enough that I wouldn't consider it stealing. You're in the same space it looks like, of course there is going to be crossover.
Here's his tweets that admit this: http://cbi.vc/1u9KQu9
At my company, we routinely look at what our competitors are doing and we routinely look at ways of integrating their ideas into our product. It's not stealing, it's just business.
Stop whining and start creating some real backend system and process so that you can offer real value to your customers. I bet you would love to get patents on those charts and color combinations uh?
There's different fonts, different colors, different spacing, some less important elements are in different places. Forget it, this is just a tweet to stir up discussion and generate some page hits.