The concept of the time zone is very important as it helps us to know the time difference between two different places that use different time zones, though there are also many challenging parts of it. CST is the short form of Central Standard Time, while IST is the short form of Indian Standard Time.
The major difference between the two time zones is their time differences, most especially with respect to the Coordinated Universal Time (UTC) or Greenwich Mean Time. With respect to Coordinated Universe Time, the Indian Standard Time is plus five hours and thirty minutes(+5:30), while the Central Standard Time (CST) is minus 6 hours(-6hours).
The implication of this is that the Central Standard Time will be eleven hours plus thirty minutes later than the Indian Standard Time. This means that if it is 12:00 pm in India, it will be around 1:30 am in America. CST is the time zone used in Central North America, while IST is the time zone used in India.