I think mariner fans way is theoretically better as less housing means less friction and to route it all the way would mean more sharp bends... i think also that old suntour sets only came with enough SS housing to route it this way.
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1 Super Record bike, 1 Nuovo Record bike, 1 Pista, 1 Road, 1 Cyclocross/Allrounder, 1 MTB, 1 Touring, 1 Fixed gear