I'd guess Polaskia, if those are the two choices, but maybe they're Stenocereus.

I was waiting to see what others would say. Polaskia chichipe is a cactus I have a difficult time iding. I have this pic in my head of what they look like and they can differ from one to another, imo of course;).

Mine looks totally different from the ones above.

The spines on the Op’s cactus is spot on for P. chichipe, but the ribs aren’t according to Llifle. I have noticed ribs can be off sometimes on cactus, but the spines usually don’t lie;).

Thank you both. cactusmcharris, are you thinking Stenocereus pruinosus?

The reason I’m saying P. chichipe, mine looks very similar to the one in the link below; it even exhibits a slight frosty/powdery wave-like pattern, which is not very evident in the pictures I posted.

Kara’s has red edging that mine lacks, but is that something that shows up more in winter? I’m not sure.

Anyway, here’s the link to the photo I was referring to:

https://www.gardens4you.ie/polaskia-chichipe-ie-en.html