Stratis and Waves are not at the same level of development. Waves is much more advanced, but Stratis has serious arguments for securing a place in the blockchain ecosystem, and seems underrated for the moment.
Waves advanced? In what scale? I really wonder lol, but strat has more advantages over waves. I'm sure of strat success for 2018.
I said a little more advanced because Waves is a project a little older (a few months) and has announced a stable release since September. But I agree with you, Stratis is a project that will surely know the success in 2018.