Even if you're not adding a conductor now, but eventually plan on adding one, you should choose option #2
kit#1 has three holes cut out.
ethernet rj45 in,
pixelnet rj45 out
and power
kit#2 has extra holes cut into the case for people planning on adding the conductor.
ethernet rj45 in,
pixelnet rj45 out
and power
plus...
for the memory card, and audio (someone can correct me if there are more holes.