hello aspirant,
see engineering is technical line study. you need to learn the practical application of physics and applied math. and on the other hand b.sc course is more focus on proving the theory and it consumes a lot of brief study. on job market after completing 4 year if you study well in btech you may get a job , and also after b.sc you can give many government exams.
if you really passionate of applied physics then you may join engineering.
so best of luck. take decision as per your choice.