For generations, the cola war has been raging with soda enthusiasts taking sides of either Pepsi or Coke.

But aside from the multi-million dollar advertising campaigns and packaging - can you really tell the difference?

To many, the two drinks appear to be incredible similar but it turns out, there is a very real reason that you may have a taste preference.

According to Malcolm Gladwell, there's a significant difference in flavour.

In his 2005 book Blink, he confirms that Pepsi has more of a citrus flavour, while coke is characterised by a raisiny-vanilla tang.

He also states that the sweeter and more citrusy taste behind Pepsi is why it usually wins in taste tests. This gives is a stronger blast of flavour while Coke is a lot smoother.

The amounts of sugar in food and drink Show all 6 1 /6 The amounts of sugar in food and drink The amounts of sugar in food and drink Minstrels A 42g bag contains 28.9g of sugar The amounts of sugar in food and drink Dairy Milk A 49g bar contains 26.8g of sugar The amounts of sugar in food and drink Skittles 45g of Skittles (about a quarter of a large 174g pouch) contains 40.4g of sugar The amounts of sugar in food and drink Ribena A 500ml bottle of Blackcurrant Ribena contains 23g of sugar, down from 50g/500ml after it was reformulated to avoid the government's tax on sugary drinks The amounts of sugar in food and drink Coca Cola A 330ml can of Coca Cola contains 35g of sugar The amounts of sugar in food and drink Innocent Smoothies A 250ml bottle of strawberries & bananas Innocent Smoothie (the middle size) contains 26g of sugar

Looking at the nutritional content, Gladwell’s analysis does make sense. Pepsi contains slightly more sugar, calories and caffeine while Coke has marginally more sodium.