BSC MLT:

In this the students learn to detect and diagnose various diseases and get an idea of various treatments

Average salary:3 to 6.5 lakhs Per annum

BDS:

Bds is for becoming a dental surgeon.This course contains various dental surgeon cateroize aspects,denture and surgery in same field.

Average Salary:15,000 to 30,000 per month depending on type of jobs applied for

The question you have asked which one is better.I would rather suggest you to for BSC MLT as there is a much higher prospects of getting good job and widening your career.

All the best for future!!