coke zero and diet coke

coca cola is the big money maker when it comes to soft drinks they have many different types of coke like coke cherry, coke vanilla, coke strawberry and coke lime they have all of these options also in diet and in zero

diet coke
diet coke was first introduced in 1982 as a sugar free version of their world famous coke so that people who don't want coke because of the thought of it being bad for you. 

coke zero
coke zero was introduced in 2005 as a similar idea to diet coke but with a different flavour profile that appeals to men more than women.

the adverts
diet coke is more focused on appealing to women than men in adverts as in most diet coke ads there is a group of women drinking diet coke and a muscular man walks into the scene and makes the women get "turned on" (for lack of a better word).
coke zero these adverts are very focused on men as they are full of action such as a man and woman in bed then the woman's parents turn up and the man cleans up within seconds and leaves on a helicopter into a warzone.