In term of investment it is really hard to tell but I will go with Ethereum specially with POS is close and right at the corner .
Now about the question why Ethereum have more than 90% of ICO ?
I used Waves and Ethereum and for some reason I found out that Ethereum is more UI friendly and more appealing maybe that is why most project use Ethereum because it is not about project and what they think is better platform it is about which will bring more investor to them , And the answer is so clear Ethereum . I saw couple of projects build on waves and they just changed to Ethereum after couple of of weeks from there ICo running , For me when I see waves on the Ann thread title I just pass this project , And I dunno why I am just not feel comfortable using waves platform it feels laggy .
Thank you for your input. The difference in UI certainly is something mentioned by several people. I have to say WAVES did not seem to lag at all when I used it and the UI is fairly modern, user friendly and seems better to use than say myetherwallet. If the functionality or aim of a user is to create a token then ETH wins by sheer numbers but I still have not been to understand why so few people use WAVES.