Well it should be noted that waves cannot do what bitshares platform enables. Waves has centralizing solutions that nearly make blockchain addition pointless from my perspective.
So if this argument has merit (ive seen waves holders concerned about this), then waves cannot scale in a decentralized fashion like bitshares can.
Additionally, wherr you see waves having a 9 month headstart, bitshares actually has been around for nearly 3 now and has proven its consensus algo along with providing a dex where all tokens can be traded.
Waves may survive but i seriously doubt it will be considered as valuable as bts in the coming years...