That is definitely an oscar, and not a hybrid in any way. I would quite literally bet my life on it. Oscars can only hybridize with other astronotus species, most of which pretty much look exactly like oscars, just with variations in colour pattern, and are so rare in the hobby you'd be extremely lucky to ever see one; even if you did, it certainly wouldn't be that brightly coloured. Anything that looks that much like an oscar but isn't is not something you are going to be able to pick up at the store. It does, however, look like a rarer colour variation... red satin, or something like that? I forget what they are called.
As for being a midas/RD, I don't think it looks much like this, apart from being remotely the same colour: