What is the difference between IIIT Delhi and IIT Mandi, in terms of coding culture?

If you're getting IIIT H for coding, then you're definitely going to face some heavy competition although it should be your choice because of its expertise. NIRF has ranked it #43 and IIIT Delhi ranks #58, whereas IIT Mandi ranks #31 the same. Their coding culture is evolving and it can be estimated that their ICPC and GSoC are going to improve a lot in the upcoming times. 

Here are some facts for you-

• IIIT Delhi was established a year before IIT Mandi. It is basically CSE-centered, with marked attention to it. IIT Mandi, on the other hand, has a lot of varied branches and so the coding culture is a bit more advanced at IIIT Delhi.
• The IIT tag is much sought after, however, being from IIIT is not a bad deal either. At IIIT D a lot of big names like Google, Amazon, Goldman Sachs, Microsoft, and Accenture come for recruitments, although your overall performance will decide your placement. 
• The campus at IIIT D is quite beautiful and doesn't lack anything. It has hostels, recreation centers, dining facilities, a library, and an information center. The second phase of construction is ongoing as well.

Here's a comparison table-

If you reside in Delhi or Mandi, you should definitely visit the campus to decide. At IIIT D you can visit during open house sessions to experience its liberal culture. You can now decide according to your situation and goals.