I don't think they are the same.
I think Buddha had a pretty hands on way of getting from point A to point B.

I think what he taught did not have all that much to do with to "divine" realms..
It did have to do with freedom from suffering. A goal although hard to reach, difficult to understand.(his words) but attainable by men and woman obviously.

The more esoteric additions were undoubtedly part and parcel of the discussion between monks and were even practiced and taught by some of the noble ones/disciples..

Which is fine by the way, I think everyone who feel drawn to the more esoteric parts should definitely explore them. I know I did.. For me though these days.. I'd be happy to gain stream entry or 2nd path first before going there again.

WIth Love
Eelco