From my experience in very humid and tropical climate :
1. Air layering propagation is more simple , faster and having 100% success rate. but more difficult to deliver a plant package for trade/exchange , especially to overseas colleagues.
- Using rooting hormone ( IBA 100-200 ppm ) on air layering could speed up time of the rooting process from 4-5 weeks to 2-3 weeks.
- Plant from Air layering propagation could start producing fruit faster ( 4-5 months ) than by stem cutting
2. Stem cutting propagation , little bit more complex , longer process and difficult , the success rate is about 25-30% , but very easy for delivery , trade/exchange for a new figs and could produce a lot of stock.
Its only my personal opinion from my limited experience about stem cutting process.