I know people from both Bethune College and Vidyasagar College. According to what I heard from them, I will say the former is better. 

• Bethune is an all-girls college and it is quite strict. If you want good academics with regular classes then Bethune is the right choice.
• Vidyasagar has union problems too. At Bethune, you won’t have to face such problems as party politics doesn’t exist here. 
• The faculties and the ambiance of Bethune are great.
• The facilities offered at the college are good. Both the central and departmental libraries have a good collection of books.
• There are many extracurricular activities for you to participate in. 

These reasons make Bethune a better option for pursuing your course. 

Both Ashutosh College and Vidyasagar College are reputed colleges under CU. Both have their own advantages. If you are only looking for quality education then choosing Vidyasagar College will be better for you. The only disadvantage here is the administration and they are not cooperative. 

On the other hand, Ashutosh will offer you better infrastructure. Academics at Aduthose are also decent. Both colleges will offer similar facilities. 

So, you can choose either of these two colleges according to your convenience.