Hello,
VTU is a better choice than autonomous. Autonomous colleges are those colleges that are affiliated to some university (most colleges are affiliated to VTU) but form their own syllabus and conduct their own exam. However, the degree is still awarded by VTU. Most other colleges follow the VTU syllabus and exam.
Autonomous colleges are often difficult to get into if you are rankings are average. VTU also has good enough syllabus to keep students engaged and also they get satisfaction in results if you did well knowing that you faced better competition and stricter standards. The only problem is that VTU has really difficult evaluation.
I hope this helps,
All the best
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