Bulgari pour Homme smells like the grapefruit of the gods. This is a bright, ripe (sweet) citrus blended with a soft darjeeling-like tea note. The notes list bergamot and orange blossom, but I get grapefruit and more grapefruit. The base is noted as amber and musk, but to my nose neither of these elements translates directly. They serve instead to make sweet notes feel sweeter and to make the overall effect more sumptuous.
Bulgari pour Homme Extrême smells similar but with a bit more of the green, bitter aspect of the pith allowed to come through, and with better lasting power (the regular pour Homme is too weak for some but – as with Vétiver Tonka – if I like the scent enough, I’ll just spray more). Extrême could be seen as the more conventionally masculine of the two, and is the one I would recommend those who prefer a masculine style to smell first. I like to wear both at once, the sweetness of one balancing the bitterness of the other and vice versa.
These are some seriously voluptuous citruses, and you can completely ignore the ‘pour homme’ bit if you like. I recommend that course.