Chemical Science and Technology is a great choice for those who have a genuine interest in the subject of Chemistry. 

• It comprises inorganic, organic, and other aspects.
• It covers aspects of drug design, medicinal chemistry, material science, environmental science, and even molecular biology. 
• It is a research-oriented discipline
• It's a contemporary of Engineering Physics
• Its syllabus covers topics like nano-chemistry and nano-technology which is the next big thing in the engineering sector 

Prospects

• The prospects of CST are not at or with that of Chemical Engineering unless you are going to opt for non-core jobs.

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

• The prospects of Chemical Engineering are better than CST and its students receive better packages.

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.