I see no reason to compare these two different coins. But I still think that ethereum is the best of all, and that it is one of the most powerful and successful projects.
both of them can be used as platforms. but, however, I think waves are still quite far behind ETH. looking at current IEO developments, most of them use platforms from ETH, and not from waves. in terms of price, I think ETH has a pretty good development compared to the current waves.
I used to think that Waves will beat ETH too, there are too many hypes behind the project when it was campaigning for a crowdfunding. The start of the development where very good, but somewhere in the middle, Waves become sluggish in term of development and the community quiet down. Then ETH which is leading slowly pulls away. I do not know what happen in this Project anymore because I was one of those who have stopped supporting the Project when the value of its token starts to crash.