People sometimes ask which one they should buy, candle or mist, as if it's a choice between two versions of the same thing. It isn't, really.
What a candle does that a mist can't
A candle builds scent slowly, over hours, and it keeps building as long as it's lit. It suits a room you're going to be in for a while — a lounge in the evening, a bath that's actually going to be a bath and not a five-minute rinse. It also does the obvious other thing: it's light, not just fragrance.
What a mist does that a candle can't
A mist is immediate, and it's finished being immediate within a minute. No flame, no waiting, no heat. It suits rooms you pass through rather than sit in — a hallway before guests arrive, a bathroom straight after using it, a car that's picked up a smell you'd rather it hadn't.
Using both without them fighting
If you're doing both in the same room, mist first, candle after — let the top notes from the spray settle before introducing a second scent on top of it, or the two will compete rather than blend. Mixing fragrances across a mist and a candle in different rooms is fine; less so in the same room at the same time, where the softer of the two tends to just disappear under the warmer one.
Neither one is the "better" product. They're just answering different questions.