I remember seeing this and found it odd that Demon FX would bother to add the LED and then seal it in the enclosure.
That said, I don’t think it necessarily means that it’s a different compressor or that it sounds nothing like a Cali 76. It may or may not (I have no idea), but the term “clone” doesn’t mean that it’s an exact replica (although obviously DemonFX doesn’t shy away from that), but that the effect is using the same components in the same way. The Mooer Bass Sweeper is an EHX Bass balls clone, but they look nothing alike and the Mooer added knobs for the controls that are only available as internal trim pots on the Bass Balls.
Just because DemonFX didn’t expose gain limiting through the jewel lamp doesn’t mean that they didn’t try to copy the rest of the compressor (although, again, I can’t speak to this one way or the other since I don’t have either).