Hey,

B.TECH Biotechnology deals with using technological principles in the biological or living systems. It is the integration of both biological sciences and technological world. You can know more about B.TECH Biotechnology in detail over here: https://www.careers360.com/courses/b-tech-in-biotechnology

Whereas, if we come to Engineering Physics, it is for those candidates who are interested both in research as well as engineering field. You can get to know some of the new and allied fields of Physics along with concepts of engineering. Know more here: https://www.careers360.com/courses/engineering-physics-course

As, now, you can see,  B.TECH in Biotechnology is more focused towards using technology for Biological sciences while Engineering physics deals with physics aspects. So, you can choose any of the course, between them, by seeing your area of interest. Both of these courses offers a good exposure an note that, you can only o good in a particular field, if you are really interested in it. So, choose based on your interest and future prospect of what you want to do further.