Icaew From Mid Tier Firm Or Acca From Big-4?

I guess this has been a question mark for many ACCA Affiliates and now I am also one of them.

I am an ACCA Affiliate and got an offer for entering an ICAEW training contract in a Top 10 firm in Pakistan which is also a correspondent firm (soon to be a full member) of a Top 10 International Network of firms.

But then there is also an option to join a Big-4 firm which only offers the ACCA training contract.

Please highlight the pros and cons of both choices with sound arguments. 🙂

P.S. I am currently residing in Pakistan, but I might plan to move abroad e.g Middle East, Australia etc if an opportunity presents itself.