Yes. There is absolutely no reason someone else could not make an SG copy as good or better than what Gibson makes. Tokai and Orville are both very good brands, and I have a friend who owns a very very nice Orville SG.
Now that I've stated that, there is a lot of clarification to be done. When you talk about Tokai, you are talking about a lot of different things. Today's Tokai is not yesterday's Tokai.
If you can get a Tokai SG copy from the 1970s, then that is absolutely on par with Gibson. Tokai models from that period were accompanied by numbers, the higher the number generally meant the higher the build quality standards.
Don't forget Burny or Greco from the exact same time period.
When we talk about Orville, it's my opinion we should also talk about Epiphone. I will tell anyone and everyone that I believe top-end Epiphone to be every bit as good, possibly better, than low-end Gibson. This is just a general opinion of mine. You can get more bells and whistles for the money on high-end Epiphone than with the low-end Gibson.
And Orville was basically supplanted by an expansion of Epiphone. They are not exactly the same thing, but they're not far apart.