In September, I walked the Caminho Português in the Altra Paradigm 5s—straight out of the box. I got only minor blisters on two toes, which I drained and then bandaged for two or three days. No big.
I’ve been hiking/backpacking in Altras for at least seven years. I’ve gone through several versions of the Lone Peak, Olympus, and Timp on trails in the Bay Area and the Sierra. Before Altras, I’d regularly lose toenails, get blisters, etc. They truly changed my experience for the better.
I chose the Paradigm 5 for the Caminho; the extra cushion and less aggressive traction made sense for roads and cobblestones. When the 6s came out, I tried both the Paradigm and Provision—and opted for the Provision for my next Camino (which I’d be walking now, if not for omicron). The models differ slightly in the amount of cushion and stability. I think it’s a personal preference. Order both, walk around your house, and send one pair back.
Note: These shoes don’t need “breaking in,” at least for me. HOWEVER, if you are new to Altras and aren’t used to zero drop shoes, be sure to put some miles on them before taking them on a long trail.
I’d also recommend packing a small container of Trail Toes, just in case you start to get a hot spot.
Not sure I’ve answered your question, but hope this helps in some way.