You won't need a performance radiator unless you're tuning the car,
and generating more heat in the motor that needs cooled more
efficiently. The radiator is the same for the V6 and V8, the
performance just indicated it's less restrictive and provides more
volume.
This rad says is for both V6 and V8, not performance:
Note the upper and lower rad connection points.
This one says performance, GT:
Not the upper and lower hose connections; they're in the same spots, so why can't
you use it?
There are two different EcoBoost rads, I am guessing you mean the GT350 ecoboost
rad?
If you check the fitment data for these rads, it still says V6 Coupe 2-Door,
3.7L 3726CC 227Cu. In. V6 GAS DOHC Naturally Aspirated.