A smell-a-like is a perfume that smells like a designer fragrance but with a different name and packaging, and at a cheaper price. A smell-a-like isn't an exact copy, but often smells very similar.
Al-Rehabs Choco Musk is 100% the same fragrance as Montale's ridiculously priced Chocolate Greedy. Out of 10 blind tests, everyone said they smelled EXACTLY the same. I would even go as far as to suggest they may very well be the same. Who Know's? My Nose Knows!