Dear aspirant !

Hope you are doing well ! Let him choose according to his interest,don't impose science on him if he can't manage those subjects,other than bcom there is lot of better option in commerce also ,don't just think of bcom . Try for CAT , competition exams like SSC chsl,cgl etc ,can go for upsc . yes there is difference between their value in terms of job opportunity . B Tech is professional degree so the chances of getting job in technical field is easy it also depends on your knowledge and interest in that field.

Hope it helps you!