Candidates generally get into the dilemma whether to go for B.tech or dual degree programmes. 

It completely depends on what you are interested and your degree is of interest to you. One year extra hardly matters in much long journey of life. 

In B.tech all you have to do is pursue your 4 year programme and get awarded with a good job or choice of going for further studies. If you have interest in research work, you can go for masters degree in India or abroad. The important part of B.tech is that it keeps you free of any baggage . While in dual degree you have to make choice before joining college.

Its like a combo package where you willl get two degrees in a single course and the important thing is it saves your one year. If you are really oriented towards research work and higher studies then its the best package to pick. Thus, before joining the college you have to make choice as how you want to unfold your future. 

Now talking about placement, when a B.tech student and a dual degree student apply for same position in a company, invariably it is latter one getting placed.