Little Trees are the default. They are cheap, familiar, available at every gas station, and for a lot of people, the only car freshener they have ever known. That familiarity is exactly why the actual comparison is worth making, because default and best are not the same thing.
Start with longevity, since that is the number one complaint about traditional fresheners. A tree freshener is built around a simple synthetic fragrance load with no real structure to it, one note, released all at once. Most people notice a real drop-off within 2 to 3 days, and by the end of the first week, what is left is faint at best. A hanging car perfume, built with layered, cosmetic-grade fragrance, is engineered for controlled release instead of a single burst. That difference is why Drive scents run 2 to 4 weeks instead of days.
Then there is what you are actually smelling. A tree freshener is single-note by design, one scent, one intensity, no development. A layered fragrance moves through stages the way a real perfume does, top notes giving way to a heart, settling into a base. That is the difference between "car smells like black ice" and a fragrance someone actually asks about.
Ingredients matter too. Traditional fresheners are typically formulated with cheap synthetic fragrance oils and minimal disclosure about what is actually in them. Cosmetic-grade, non-toxic fragrance is held to a different standard- the kind of ingredient sourcing you would expect from a fragrance you would put on your skin, not just hang in your car.
And then there is the part nobody talks about: how it looks. A plastic tree hanging from the mirror is instantly recognizable, and not in a good way, in a car that otherwise looks put together. A sleek hanging perfume reads as intentional instead of an afterthought from a gas station checkout line.
None of this means tree fresheners are useless. They are cheap, and they are everywhere for a reason. But cheap and everywhere was never actually the bar. It was just the only option most people knew about.