Whats the difference from Blue HEG band and this one?

I recently pre order HEGdoino 2 here on the web page I am looking forward to receive my device.

But I would like to know if are any difference between this blue head band sold for 500 USD and this one sold here for more affordable price?

another question is would this band work with the device they seams to share the same connection.

Thanks in Advance and keep up the good work