i would like to ask you for an advice about the Zero pinhole cameras:

i have never used before a pinhole camera but would like to as for an advice which would you recomend me for landscape fotography when i travel to take with me.

I usually do mid format b/w photography.

which of these will you recomend ,and what do you think is the main diffrence:

Zero 6x9 Multi Format"

Zero 2000

Zero 612B Multi-Format

Thank you