Interestingly, the Air and the Pro now are almost identical in specs: same SoC, same display, same connectors, same RAM, same SSDs.
On the plus side I only see the larger battery for the Pro. On the minus side it's more heavy and a bit more bulky. And it's got the TouchBar (I'd count that as a negative...).
Honestly, why spend the $300 extra? I'd take the Air any day.