Minoxidil or Finasteride: which is better for norwood hair loss level 5/6?

With this degree of hair loss, it's unlikely minoxidil or finasteride will have much effect. Hair loss in men is driven by genetics. A hair transplant might provide some density in the very front depending on the donor area. A multivitamin will not provide much benefit for your hair - if any at all.

With this pattern of hair loss, I doubt you will get much real benefit from minoxidil and if the pattern is near completion, then finasteride will not have much of an impact.