Hmmm both kits use GXL wire....that's a good thing since it is a superior insulation. Never use the cheap vinyl stuff or crap from HF. The AAW kit looks more complete and is not pre-terminated......make the wires easier to run if they arent crimped to the fuse block. More important than the quality of the wire is the quality of the crimp.....AVOID cheezy crimp splices if you can.....if you must use a crimp splice, crimp it properly with the correct AMP pliers...NEVER use regular pliers to crimp with. If you can, solder and heat shrink all splices....if you must splice. Every connection is a potential open circuit. NEVER use IDC splices (insulation displacement connection) that use the little "V" to make the connection. Use black, not white ties, use quality ones from an electrical supply, NOT the HF crap. NEVER let the weight of the harness be transferred to a connection, always tie the bundle to take the load off the connection. Tie the harness so vibration does not flex the wire. If in doubt, use larger gauge wire and never use smaller than 16ga. Make sure your grounds are to bare metal and use a star washer on grounding lugs. Use a heavy ground between the body and the frame and the engine....dont rely on the body bolts to make the ground path. Use relays on high current loads like headlights, cooling fans, a/c compressor, etc. Battery cables should be as large of wire as practical.....scrimping here will cost you later. Battery post clamps need to be a quality crimped and soldered assembly....dont use the kind that clamp on the cable. Your alternator wire needs to be sized to the alternator output.....OOPS, I sure got away from your original question...sorry.