Hi,

I have vague understanding what Vulkan is and vague understanding
what stable-diffusion.cpp is. However what is practical
difference in terms of setup and hardware requirements between two
flavours of stable-diffusion.cpp software?

When one should install default flavour and when vulkan flavour?

How well vulkan flavour works on OpenBSD and with what hardware?

Do you know hardware selection process which could allow choosing
to run stable-diffusion.cpp on OpenBSD?

-- 
Regards,
 Mikolaj