I agree that comparing these Caminos is like comparing apples to oranges.
The scenery on the VdF is unparalleled, but with that comes the constant physical work of getting from one town to another, up and down mountains. There is no ability to establish any meditative cadence to your walk. The walk is work. Period.
If you crave the community spirit, there is very little compared to the Santiago routes. Very few pilgrims on this one. That may be a game changer. It was for me.
The Italian culture is not the same as any of the Iberian cultures. For me, at least, that took some adjustments. It ain't Spain. Neither good nor bad, just different.
However, all that said, if you love St. Francis, this is the pilgrimage for you. You will find his presence and his influence everywhere! If you spend time with his writings, and at each site dedicated to him, reflect on that, you will be uplifted and inspired. Especially at La Verna, it is a most sacred and magical place. And there are many, many more along the route.
This pilgrimage takes work. But what in life that brings the most meaning, doesn't?
Happy planning, and happy choosing.