Chemical Science and Technology is a great choice for those who have a genuine interest in the subject of Chemistry.
Prospects
Chemical Engineering, on the other hand, is a blend of a profusion of physical chemistry along with a mess of physics, math, and many other things. It entails the processes that help maximize efficiency, increase profit, and focus on the best possible way for the production of any product in any industry.
Prospects
Ultimately, it’s all about if you are going for core or non-core jobs. Either way, Chemical Engineering is a better option than CST unless you have a serious inclination toward Chemistry.