What is the difference between GASGAS ex and ec?

As a cryptocurrency enthusiast, I'm often confused by the various tokens and currencies out there. Could you please explain the key differences between GASGAS ex and EC? Are they both used in the same blockchain network? Does one serve a different purpose compared to the other? Are there any key factors that investors should consider before deciding to invest in either? Understanding these nuances is crucial for making informed decisions in this rapidly evolving market.