A candle scents a room you're staying in, with an open flame to watch. A nasal-stick inhaler scents a personal moment, no flame, no room commitment. They solve different problems.
Candle: strengths and limits
Ambient light plus scent for a fixed space — but it stays where you light it, and needs supervision.
Nasal stick: strengths and limits
Fully portable, no flame, scents only you — but it won't light a room or do the cozy ambient-object job a candle does.
Picking based on the moment
A room you sit in for hours → candle. A personal, portable moment → nasal-stick inhaler. Plenty of people use both. Unplog's Focus, Calm, Energy, and Bliss cover the portable side.