First of all I am not a mod. But I do runs on a SuperNT. I dont really see how it would be considered OG-hardware. Mostly because on the default setting it runs a bit slower than OG-hardware. Can't remember exactly how big the difference is in my head, but i think it's something like 1s slower over 10 minutes. You can change the buffer settings to get it to run at OG speed. But this will either cause the game to have a screen tear once every 10 seconds or it will cause your system to have bigger input lag. Either way I think this is different enough to not be considered equal to OG-hardware (beside the point that it's not a nintendo console).
That being said, I personally don't mind the EMU-tag. It is hardware emulation after all. And I do think it's close enough to not cause any issues about legitimacy of the run itself.