Strategy Consulting at T2/Boutique vs Implementation Consulting at MBB

It would be great if someone could provide guidance on which to opt for between Strategy Consulting at T2/Boutique and Implementation Consulting at (M)BB. Both offers are based in the Middle East.

Dimensions that I am considering, feel free to add beyond these (in case I missed)
1) Long-term career prospects?

2) Exit opportunities? In terms of the type of roles, industries and regions?

3) Salary for IC at (M)BB is 30-40% lower than the SC offer at T2, factoring in the base and performance bonus. Is it still worth considering (M)BB?

4) Any insights into salary progression higher up the ladder (from Consultant/Associate onwards) would be appreciated. Is the % gain at MBB with each level-up higher vs T2, thereby narrowing the difference, a few years down the line?

Thank you in advance :)