Chatgpt says
Good question — it mainly comes down to ingredients, labor, and positioning.
1) Ingredients & butter content
Pineapple tarts usually use real butter and richer dough.
Pineapple biscuits often use margarine or shortening, which is much cheaper.

Butter is one of the biggest cost drivers.
2) Labor and craftsmanship
Tarts are hand-shaped, filled, crimped, and decorated.
Many are made in small batches for festive seasons (like Chinese New Year).
Biscuits are typically machine-made in bulk with simpler shapes.

More manual work = higher price.
3) Pineapple filling quality
Tarts often use slow-cooked, fibrous pineapple jam with less sugar and more fruit.
Cheap biscuits may use more sugar, starch, or artificial flavoring.

Better filling costs more.
4) Seasonal and gift-box pricing
Pineapple tarts are seen as a premium festive snack/gift item, so brands charge more for
packaging, branding, and limited-season demand.
Pineapple biscuits are treated as everyday snacks.
In short:
Pineapple tarts = real butter + handmade + premium filling + festive branding → expensive.
Pineapple biscuits = cheaper fats + mass production + simpler recipe → cheap.
If you want, I can break down the actual cost of making a jar in Singapore to show the margin.