Maybe it's just the angle, but this doesn't look like a RD. It looks like a faded Flowerhorn. I could be wrong, but the shape just doesn't look right for it to be considered a RD, Midas and/or Midevil.
Without knowing how it was bred, you won't be able to say if It's a Fader, Red Tex, Midevil, etc... All you can say with certainty is that it's a HYBRID with strong Red Devil or Midas influence. And, No... You cannot sex for sure without looking at the vent.