Hi, b,
Welcome to the forum. Some will undoubtedly answer this question emphatically one way or the other, but it is a personal choice. I can tell you that the most popular shoe on both the Appalachian Trail and the Pacific Crest Trail in the US are Altra trail runners, at any time of year. My theory was that these hard core wilderness hikers know something that an average camino walker like me doesn’t, so with @davebugg’s excellent advice (search for some of his shoe commentary, it is outstanding), this year, after 17 years in boots and hiking shoes, I went to Altras Lone Peak and never had a drop of regret. The traction on that shoe is plenty strong enough for the Salvador/Primitivo. Sadly, lots of the Primitivo trail has been leveled and filled with crushed rock (thankfully, up till now that has been limited to Galicia), so a boot might just give you foot pain.
I know that some people like the waterproofing feature that you can’t get in the trail runners, but again the common wisdom that I took was that the construction of the trail runners leads to very rapid drying, and the goretex boots trap water inside.
You’ll love the Primitivo and Salvador. Buen camino, Laurie