Cables are made with copper wires soldered to some plugs. Honestly, you think it matters who solders 3 wires to some plugs? Do you think the copper wire they use is worse than what AKG headphones come with? OFC is OFC.
If you're looking for a replacement cable with free shipping with a length more reasonable, can't go wrong with that. That's my opinion.
Or you can learn to do it yourself. Just order some cable from some audio store, plugs and solder it yourself.