Essential oils come from plant material in nature and they are volatile. Ethereal means volatile, which means that the scents go into the air without leaving a solid residue.
Essential oil mixes are composed of multiple essential oils. This makes these mixes natural and an effect can also be attributed to them.
Perfumes are often partly composed of essential oils in collaboration with synthetic additives to obtain a specific scent. This is because fruit scents are not available in essential oil, except for citrus scents. Especially scents like Strawberry, Ocean and Seaweed etc. are not available as essential oils.