Both of them are good but I think that you should invest your money in waaves because I can guarantee that you will earn a greater profit with waves than with ethereum. Ethereum is very strong right now and its price is high. It can not easily x2 anymore. Waves is the better option in this case. However, investing in ethereum classic will even be better. Ethereum classic is way better than waves

Has anyone tried their decentralized exchange?

Definitely both have a good platform and i don't wonder how this two coins are on top markets .I cant conpare but i know one thing this two isagreatinvestment in the long term for future use.

Indeed. It depends on what you like ethereum or waves. As long as you can manage or deal with them thats enough.

I can image you saying that because your own bowhead scam ICO is going to be launched on waves

https://www.reddit.com/r/Wavesplatform/comments/6lirgc/interview_with_bowhead_health_team_about_new/

These coins are good coins to invest, Etherium comes second to bitcoin and creat great intrest of investors and many investors get return great and attract from Ethereum
Waves coin is good coin no doubt but ethereum coin create a great hype.

also I heard "Ethereum will be the next Bitcoin"

Well, this video is too long to watch fully but I think that this guy is just not comfortable with English, so it's hard for him to speak properly. Anyway, here's a video in Russian: https://www.youtube.com/watch?v=OtwB5zQtOx8. Here he speaks more confident. He looks like he really cares for the project he is leading. However, I don't like him anyway, he seems suspicious and not smart enough.
And I heard that NEO will be the next ethereum, not Waves I guess this all doesn't make sense. Waves enables to create personal tokens and this is quite good. However, I don't think this coin is good enough to be compared with such strong coins as eth.

In the last price rise when ETH rose to 400$, it was really on the way to be the #1 marketcap and surpass BTC. I think it's just a matter of time it will happen again. If you are not sure WAVES VS ETH with not buy 50/50 then?

By the look at it of course WAVES seems like easier to gain 10X vs ETH, but hey last year ETH was 15$ and it looked really hard at that time to beleive it could do 10X-20X, but it did.

The time will show The same thing was with ETH back in days when it was only 3$ and everyone was saying that it wouldn`t be the future of altcoins. We see it different at the moment, WAVES can be new upcoming ETH as NEO, EOS and maybe ARK( i don`t belive in it )