Depends on what you define as a working product really. Stratis has been it's own, built-from-the-ground-up blockchain from the beginning.

All things considered I would say Stratis has more of a working product than many other blockchains. Stratis currently has a 'proof of concept' going on with a company called Earthtwine which is a large fish industry company to showcase their logistical capabilities. Then there's the digital identity app too, side-chains, high tps, working staking mechanism, and now privacy features on the masternodes. It seems to me like Stratis is nearing the point where you could call it a working product v1.0, while I would consider something like NEO more like v0.7 in terms of development.