Day-long trials
How to test sweet perfumes through the day
Test sweet perfumes by recording sweetness balance and enjoyment at the opening and later. A vivid first impression does not establish how noticeable the scent will remain or whether you will enjoy its later warmth.
A HUME Fragrance buying guide

Specify the sweet reference
Vanilla-like warmth and sugary fruit can feel different. Name the quality you enjoy or want less of instead of giving every sweet scent the same brief.
Observe comfort in context
Choose a normal appropriate setting and note whether the later sweetness feels comfortable. Do not layer unfamiliar scents while trying to judge one composition.
Compare willingness to repeat
Ask whether you want to choose it again for the same occasion. That preference is separate from detecting a faint remaining trace.
Try this before you buy
Record sweetness, contextual presence and wish to wear again as separate observations.