I had a Japan Epiphone, which is what the regular Orvilles were named at some point (different than the Orville by Gibson models). I also have a Greco II, and my guess is they're different pickups (at least the 70's models). Besides different looks, the 70's Greco sounds much more aggressive. More bite. My Greco II sounds more like a 60's NR than any other non 60's bird I've owned. A little more bite than my former '65 II (reverse), but still in that ballpark as well. My Japan Epiphone bird was a nice bass, but it sounded more docile by comparison.
If anyone can handle the chunkier neck (and slightly longer reach with the neck being set about 1" further out on the Greco), I highly recommend a 70's Greco II.
Greco
Epiphone Japan