1. It is less crowded, only 10-15% the number walking annually.
2. There is less competition for sleeping places each night despite there being fewer accommodation possibilities
3. It is prettier especially through the Aubrac plateau and overall the first section to Cahors
4. It is physically more challenging
5. The path leads through private vine yards and farms, it is often more intimate and personal
5. More of the little churches and chapels are open
6. Sorry Spain, the food generally is much nicer
7. Superior wine, especially in Gascony and not discounting the fine reds of Rioja (my apologies to them all)
8. Some days in summer you will not see a single other walker
9. Because of the smaller numbers, the whole 734 km feels less ‘commercial’
and less driven by the ‘Camino business’
10. Many of the villages are charming – again, apologies to the fascinating villages in the Montes de Leon

Both are great, my personal preference is the Via Podiensis and, of course, the crossing of the Pyrenees.
Enjoy!