See both of the courses are good and you can get a good exposure in both of it. Now there can be a special case when one subject can offer you more exposure than the other. If you are interested in research and want to work in the Research and Development of Pharmaceuticals and clinical research then Biotech will give you a more exposure to the field of study. It may need you to invest for MSc and PhD courses but the outcome you will get not only in the terms of salary packages but also in the terms of the outcome you get from the field for the greater wellness of the society.

To know more about BAMS visit the link below:

https://www.careers360.com/courses/bams-bachelor-of-ayurvedic-medicine-and-surgery

To know more about Biotechnology visit the link below:

https://www.careers360.com/courses/biotechnology-course

I hope this answer helps. All the very best for your future endeavors!