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Not the same, they have entirely different flavours. Cokes is stronger, and Pepsi's is smoother.
Let's see...

Pepsi ... Great
Pepsi Blue ... Shit
Pepsi Twist ... Good
Pepsi Max ... Great

Coke ... Great
Vanilla Coke ... Great
Cherry Coke ... 50/50
Diet Coke ... Good
Diet Coke w/ Lemon ... Good

... Coke wins.
by Bastardized Bottomburp September 04, 2003
The same thing in different cans.
Let's have a Coke and Pepsi taste test.
Wow, these taste exactly the same.
Like shit.
by DefaultBlur October 15, 2005
A phrase meaning a dick and a pussy.
My coke went into her pepsi
by Assholes Inc. September 05, 2003