I think merging with the Cordia team would be much better for both of you

Think about it.. They have made a bit of progress already meaning that you would have to spend your time doing something that has already been done, seeing as you have similar end results!

I think you should merge with the Cordia project and then maybe you can have your own UX's in the end?

Differentiate your UX but for the main parts I say go and help out Cordia