Both the colleges are equally good. Though it can be compared on the basis of the following factors:

• Location: Kongu College is in Erode and Krishna College is in Coimbatore. So, location matters a lot while choosing a college. In this case, the former is better.
• Strength:  Krishna College has low student strength and fewer departments compared to Kongu College. During placement, you get fewer competitors.
• Staff: Kongu College has better and experienced staff members than Krishna college. The staff of Krishna college though freshers are known to be very cooperative.
• Lab Facilities: Kongu College offers better lab facilities compared to Krishna College. 
• College Fee: Krishna College is a bit costlier than Kongu. Krishna College doesn't have any scholarship scheme for toppers, unlike Kongu.
• Hostel: In Krishna, you have to pay nearly 85,000 for a hostel. But In Kongu it is 55,000 to 60,000. But when quality and facilities are considered Krishna definitely wins.

Krishna is known for having good placements compared to Kongu. Also, the overall environment at Kongu College is very strict, whereas Krishna College shows leniency towards their students.