Which is better for me ISB YL or ISB PGP?

Hey guys!
Here’s a brief snapshot of my profile:

10th: 92.4%

12th: 95.5%

B.Tech (core branch, Top 3 NIT): 7.8 CGPA

Activities during UG:

Founding member of a student-led global club

Head of extracurricular activities at two clubs

Placement cell member

Class representative

Work Experience:

18 months as of 1st Jan 2026

Operations Engineer at a PSU in India

Post-MBA goal: Management consulting
Long-term goal: To start my own venture

Questions:

1. Between ISB PGP and ISB PGP YL, which program offers better opportunities and is more suitable for my profile?

2. Should I take the GMAT now (by end of Jan or first week of Feb)?

3. How difficult is it to score 690+?