Too much snout in profile.
Bombays are very round headed, and very solidly built, like a concrete block with legs.
The Bombay pic above is, IMO, a poor example of the breed, they have very distinct deep gold or copper eyes.
*Sorry, not to say the Bombay cat above is a poor example, just the pic itself. Black cats (as you know) are not easy to photograph, and that pic does not do justice to the breed.
Here are some pics which better show the overall head shape. Breed Profile
I don't see it, personally. The facial features are a lot different, and the coat looks a little different. I don't see it, sorry. But, no matter what, you have a special little boy!