Hi peregrina2000,
there wasn't that much asphalt on the Camino Primitivo (Interior), it was very peaceful, not too many people when I walked it, lots of mud, it had rained a lot.
The terrain was hilly and, if I remember correctly, it's got the highest point on the Caminos, Palo de Poio. I had heard sooo much about how difficult it was, it turned out to be not hard at all. Medium difficulty I would say.
The Asturian/Gallecian cuisine along the way is exquisite, I had the most heavenly cheesecakes ever!
I also liked it because I was familiar with its history, being close or in the general area of the first
Camino de Santiago. Maybe it's all a "head trip," bu that fact, along with thinking about the thousands of people that must have walked that route, contributed to my feeling comfortable on it, that I was one more along with all of them. I felt the spirit of a pilgrimage there, what I was lacking on the other one. That was important to me.
I met/made four wonderful friends there, am sure that increased the pleasures and joys of the experience.
Ribadeo-Santiago was a beaut, too. The refugio at Ribadeo is pretty close to the water, a picturesque site that looked like a post card. I understand that the CSJ now had an albergue in a much needed place along this route. That portion was beautiful.
Both of these Caminos were not heavily transited when I did them, not as many pilgrims walked on them as on the CF. The albergues were pretty decent.
I highly highly highly recommend them.
Hope this helps, my friend.
Whichever u choose to do, I wish u the best Caminos :!:
xm 8)