Possibly, although the characteristic wavy rib formation and noticeable bluish epidermis of Hertlingia (syn. Azureocereus) are not evident. Attribution will be be more reliable when the plants are more mature (much more so upon flowering). They may turn out to be varietal forms of a Trichocereus such as T. macragonus.

James

Thank you James, you are the expert. In fact they have a bluish tone compared with their neighbors.
The small one when rot on the base let me to perform a graft over a Myrtillocactus two years ago (with less experience and less knowledge about cacti) I was afraid that the cacti died. If I left it alone to form a callus I could plant it with good results, but this is the picture of what I done.
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Alfonso

I forgot to post the following close-up pictures of a stem of one of my mature Browningia hertlingiana plants.

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James

They are amazing
Alfonso