Eth is much more better, and for me, it will go higher than what waves is increasing at the moment (ETH in one day went from $800 to $1100) (waves -> $9 to $10 MAX)
Let's see, but waves is crap compared to Ethereum.
Why would you choose when you can actually hold both coins, it is a good investment and you didn't risk all your money in a single cryptocurrency your money. I would rather choose to divide my money into different altcoins.