I'm not sure about the logic board connector but the antenna config remains the same. One 2.4G and one 5G. On older models the shorter one is for 2.4G. No MIMO support. So it gives you 150 Mbps on either band. I haven't got a detailed look on the 2013 model. But It seems that you will get 450Mbps on 5G 802.11ac as apple claimed to be 3x faster. On 2.4G bands it's still 150M max.