The alien in this autopsy is much smaller than the alien in the Santilli film. This being is only approximately four feet in height, and very thin. This, is more in keeping with eye witness alien reports, as compared to Santilli's slightly oversized, and overweight alien being.
Here is a closer look at the alien's head, and upper body area. Note how much better the shoulders lay on the table than in the Santilli film.
The alien in this film, looks much more like eye-witness accounts, with larger eyes than the Santilli aliens, no ears, and a smaller mouth, and no nose. Again, much more realistic.
Look at the clock on the wall. It came from the 1940's. And look at all the equitment, all the same kinds of equiptment that would be used to perform an autopsy in the 1940s.
In my opinion, this film is more believable than the Santilli film. The alien is more life like, and more in fitting with the standard alien being reported. All objects in the room come from the fourties. So is this an alien being???