for career growth, I will take it if the title is Program Manager, in PMP perspective, Program Manager is higher rank than Proj Mgr. I can always downgrade from Prog Mgr to Proj Mgr.

no harm to try, Roles & Responsibility can always nego. That's the title that attractive in future.

Program Manager is all about portfolio management, u can self learn via cousera or you pay for it, it is good investment thou.