Both Sahyadri and St. Joseph’s Chennai follow the same syllabus as they are affiliated with VTU. So, the choice between these two colleges comes down to your expectation from the college.
Overall, in terms of academics, facilities, and opportunities, Sahyadri is better.
For Chemical Engineering, St. Joseph Engineering College is average at best.
St. Joseph is a decent option for Chemical Engineering. But if you have better choices, go for them.