Bigfoot is completely different. Their skeletal structure has significant differences. They are a different species. But we share enough to breed with them as well (so it seems. See below).
There’s also some evidence that we can breed with the Alma (a type of Bigfoot in Russia). There’s a story about an Alma which was captured by the Russians and she successfully mated with the men there, who held her captive, and bore six children back in the mid 1800s. Alma is a variety of Bigfoot, Yeti, Sasquatch, Abominable Snowman, which are all probably Neanderthal with variations on names and characteristics based on locations.
There’s evidence that the Anunnaki were not conscious of how they were manipulated by the Galzu to create human beings in the first place. But perhaps long ago in antiquity the Anunnaki themselves were similarly genetically altered and manipulated. For there’s a common thread that runs throughout existence. There are related species, like the Tall Blonds, Pleidians, Anunnaki and now Human Beings that all look alike and resemble each other.