I'm already having a post graduation in biotechnology. So a degree in data science, or a specialization in AI, but which would be a better option?

Now, this is a hard choice for me to make for you. I can just tell you what, what this means. Data Science, as I said, is a broader thing. It involves any kind of analysis with data. I'm assuming that in your field of biotechnology, where you might be doing things like gene sequencing, protein folding, maybe drug discovery, maybe drug trial management, having first good understanding of data science might help, right? I'm guessing based on my understanding of these things, which is not very deep. Both of these are good courses, I think you should try to consult maybe your professors in biotechnology who might have a better opinion.