Both are the different field & have scope in its field, It totally depends on your interest.
Biotechnology is a interdisciplinary field that combines biological sciences with engineering technologies to manipulate living organisms and biological systems to produce products that advances healthcare, medicine, agriculture, food, pharmaceuticals and environment control. After completing the programme you can find jobs in pharmaceutical companies, research labs and institutions, If you wish to make your Career in corporate world then you can go for MBA programme.

B.M.L.T is a graduate medical lab technologist program, The professionals are involved in the practical and technical work for proper diagnosis and effective functioning of biochemical laboratories. The Demand for laboratory technologist is increasing day by day. There are so many private hospitals, nursing homes, blood banks, pathology laboratories etc. require the professionals, After completing the programme you can also work health care administrator, laboratory information system analyst, as Lab Manager, supervisor etc.

Good Luck!