The reason everyone says go T3 is because it's tried and tested and generally 195 chips and the like for ford management are written to work with a T3.

Every turbo will behave differently and require a different map to run it safely and effectively. If you have aftermarket management it is not a concern as you can map it any way it needs but if you're in ford management and not wanting to have a custom chip/map created you really are best using the trusty old T3