There’s no single “better” — it depends what you value. Quick comparison:

- Taste: Pepsi is sweeter and slightly more citrusy; Coca‑Cola is a bit less sweet with more caramel/vanilla and “rounded” cola notes.  
- Sweetness/calories/caffeine (12 fl oz approx.): Pepsi ~150 kcal, ~41 g sugar, ~38 mg caffeine; Coca‑Cola ~140 kcal, ~39 g sugar, ~34 mg caffeine.  
- Carbonation/finish: Pepsi often feels a bit fizzier up front; Coke has a smoother finish for many people.  
- Use cases: Pepsi’s sweetness works well straight or with certain mixers; Coke’s balance is often preferred in cocktails and with food.  
- Other factors: diet/zero versions, price, availability, and brand preference can matter.

If you like sweeter, brighter sodas pick Pepsi; if you prefer a less sweet, more classic cola flavor pick Coca‑Cola. Want a recommendation for a particular use (mixers, pizza night, party)?
