Opening
Acqua di Giò Profondo: opens with marine notes and citrus, creating a cool aquatic impression quickly. YSL Y EDP: emphasizes sage, crisp geranium and sensual woods; YSL also cites bergamot, ginger and an apple accord in some official descriptions, so the opening feels greener and more aromatic than marine.
Heart and drydown
Profondo moves through cypress, lavender and rosemary before patchouli and musk. Y Eau de Parfum centers on sage and geranium with sensual woods and a warm tonka heart. Profondo therefore feels more aquatic, while Y becomes greener and warmer through the drydown.
Which style fits your taste?
If you like aquatic marine scents with citrus and a clean, cool feel, Profondo is closer to that direction. If you prefer green aromatics with woods and tonka underneath, Y Eau de Parfum is closer to that style.
Everyday use
Both work as everyday fragrances, but the impression differs. Profondo can feel cooler and easier in heat, while Y has a denser aromatic profile and can feel somewhat warmer as it develops.
Is one objectively better?
No. This is mainly a choice between a marine-aromatic direction and a green aromatic-woody direction. The better fit depends on whether you want a cooler aquatic feel or more prominent sage, woods and tonka.