Coca-Cola vs Pepsi
Coca-Cola and Pepsi are the two most popular and widely recognized beverage brands in the world. Within their lineup of beverages, Pepsi-Cola and Coca-Cola Classic are the predominant carbonated cola beverages.
Although when compared in double blind taste tests, the majority of people could not tell the difference in taste, people will swear they love one or the other.
If you are comparing the original Coca-Cola and the original Pepsi COLA, pepsi has 1 gram less carbonation than coca-cola.
 Brand War
Both drinks are no longer seen as a beverage but mainly as a brand. Both companies commit heavily to sponsoring outdoor music festivals and are even charitable
 Marketing Approach
Both Coca-Cola and Pepsi try to market as part of a life-style. Coca-Cola uses phrases such as "Coke side of life" in their website, www.coca-cola.com, while Pepsi uses phrases such as "Hot stuff" in their website, www.pepsi.com, to promote the idea that Pepsi is "in sync" with the cool side of life. Coca-Cola is more popular but Pepsi has a bigger company.
Pepsi tries to reach out to the younger generation by appealing to pop culture. If you visit their website you will be greeted with flashy pages containing pop music, cars, and fashion.
Coca-Cola's website also has links for music and sports, two arenas in which soda-pop is often consumed; however, Coca-Cola's is less flashy and uses a classical appeal, most likely because of Coca-Cola's long history as the standard for cola beverages.
Coca-Cola had Christina Aguilera featured in their commercials, while Pepsi had Britney Spears, Keshauntae Brown, Michael Jackson, Mariah Carey, and One Direction
Additionally while Pepsi with its younger audience tends to focus soley on pop stars, it was Coca-Cola who is regarded as having one of the greatest TV advertisiments of all time, featuring a far more mature pop band Blondie and the enormous hit "Atomic", the video played the main chorus of the song to the backdrop of professional footballers taking part in geniune competitive World Cup games and the noise a contender for the coveted title of Greatest Commercial of All Time in many nations.