Cables in different places, which is best?

Whilst looking for a new bike, I spotted that different manufacturers run their cables in different ways. Some top, some lower and some inner. Which way is considered best, or are all useful in different ways?
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It is well known that only stripes, tassles in the end of handle bars and spokey dokes make you go faster
All other go faster clothing and fitness gizmos are just placebos
― Kurt Vonnegut