Noticeability
Are perfume samples noticeable to other people
A perfume sample can be noticeable just like another application of its actual fragrance. A smaller container is not a weaker-formula category, but its dispenser may deliver a different amount from a full bottle.
A HUME Fragrance buying guide

Identify the exact sample
Check maker and version and distinguish an official sample, third-party decant and inspired interpretation. Container size alone cannot establish identity.
Keep application honest
Follow directions and record the applicator. Equal spray counts from different containers do not establish equal amounts.
Use feedback for a shortlist
A willing observer can describe presence in an appropriate setting. That observation helps your decision without creating a guaranteed full-bottle projection number.
Try this before you buy
Keep sample name and application details beside any feedback from another person.