Tried both of these in the last few days.
APOM is light orange blossom scent that is softened and warmed down with amber and cedar. It doesn't have neroli at all but approximates many of neroli notes with orange flower, and wood basenotes. APOM is a soft understated almost powdery skin scent. I may pick up a bottle of this someday - I like it that much, but it wasn't so great as to have me scrambling to spend money for it right now.
Neroli Portofino is citrus + orange flower + neroli that is bright and sunny. N Portofino is sunny, bright, and jumps off the skin with radiance all around while retaining the round warm woody characteristic of neroli. I liked it but not as much as other neroli fragrances around (Czech & Speake Neroli or Cologne Sologne). NP reminds me of a summery neroli version as Sel d' Vetiver is a summery version of Vetiver.
Both these fragrances are kind of expensive for a good everyday fragrance. One is soft, subtle, and shy; the other is sunny, bright and outgoing.