Etherdelta is a better exchange than waves, there will be more investors on this exchange. I hope new exchanges will be added in the near future.
And what is better? It is very slow with expensive transactions. This is a common Ethereum problem. But now let investors choose where it is better to buy and sell. The turnover is $ 7,000,000 per day.
One order for Etnerdelt takes almost 2 hours, on Waves 20 seconds.