I have a few friends from BVM and DDU and based on the reviews that I got from them, I will suggest you choose the former. BVM is better for Electrical, Electronics, Civil, Computer, IT branches. Here are some of the reasons why you should choose BVM.

• It has the best laboratory in Gujrat for Mechanical Engineering, Electrical Engineering.
• The faculty base for the institute is great. 
• BVM is an autonomous college and they conduct their own examination. Which is better than the bulky syllabus of GTU.
• The alumni association for BVM is quite good. They help students to conduct festivals such as UDDAN. UDDAN is one of the best festivals in Gujarat. 
• The sports facilities offered at BVM are also better.
• There are many well-known alumni of BVM. A.M. Naik is one of them. He is the CEO of L&T. 
• BVM also offers good placement opportunities. In the recent placement drive, the average CTC offered was 4-5 LPA. The highest CTC offered was 12 LPA. 

Overall, compared to DDU, BVM is definitely a better option.