I believe that upcoming catapult update will change everything and NEM, a truly fantastic and cheap cryptocurrency with a unique and progressive proof of importance concept will challenge ETH at it's own game and replace the damned Buterin's $hit coin, which only old grannies with their cryptokitties find useful
But both have their own unique ecosystems of developers and users, surely there is room enough for both to coexist? They also have different architectures so not an exact comparison.My two pence.