But when it comes to regular old cola, Coke is still king. In the last decade, Coke's market share has risen from 17.3% to 17.8%, while Pepsi's has dropped from 10.3% to 8.4%, according to ...

WHEN consumers tasted Diet Rite cola in 1958, and many puckered up at the bitter aftertaste, it began a half-century quest – still continuing – to produce a diet soda that didn’t taste like one.

If you're used to Diet Pepsi, you're probably familiar with the mild, almost dry cola flavor it gives off. Some describe it as cleaner, others say it leans toward flat if it's not ice-cold.

Diet Pepsi added acesulfame potassium to help stabilize the taste; ... PepsiCo made a similar move with Diet Mountain Dew in 2006, while Coca-Cola did the same with Diet Sprite in 2000.

Aspartame (you know it as Equal or NutraSweet) is 200 times sweeter than sugar and it's used in a lot of low-calorie food and drinks, including Coca-Cola's diet sodas. Pepsi is replacing it with ...

PepsiCo is bringing back its aspartame-sweetened Diet Pepsi, and will now offer two versions of Diet Pepsi, in an attempt to stave off falling diet cola sales. Photo: PepsiCo. PepsiCo Inc. spent ...

Christine Hibbard, who lives in Dallas, jokes she’s been drinking and buying Diet Coke as long as Coca-Cola’s been selling it (which is since 1982) and has bought two 12-packs per week for years.

A diet Pepsi on a sunny day, it’s her favorite thing in the world,” she said. Fergerson thinks Pepsi is a little sweeter and lighter than Coke, “like an airy drink to me,” she said.