Both will never become a competitor each other .
NEO is not as popular as Cardano ADA , why we must compare both. It's too far.
Many people will choose ADA
Yeah, too far If we compare NEO and Cardamom ADA.
ADA is more popular and stay at number 8.
Cardano is top 10 coins and has bigger community than NEO.
But anything can happen if the NEO team will improve and promote their project, maybe NEO will go up and compete to top 20 coins at the next several years again. But Not for now.