NEM is almost the same as ethereum, but it didn't had a success development.
You should think about all the possibilities out here.
NEM is pretty the same as eth, but they do not have the same function to create very smart contracts as you can do on eth.
That may be true; however, I think Ethereum has gained so much more support from people in the market than NEM. I think that the technology supports a lot of different types of business. It is compatible with many kinds of investments as well that keeps people coming back to use it for investment. Also, having shown its reliability and endurance throughout the years it has been present, many people have come to trust it and has believed in it secondary only to Bitcoin.