Excuse me, are Novartis and Novo Nordisk related to these two pharmaceutical companies? Which is better?

These two companies are completely different. Novartis is a Swiss company whose core business involves patented drugs, generic drugs, eye care, consumer health care and animal health care. Novo Nordisk is a Danish company, which is a world leader in developing and producing insulin for diabetes treatment. I can't say which is better, it depends on what you expect.