How fast are the 13-Inch “Early 2015” MacBook Pro models compared to one another? How fast are they compared to the models replaced?

How fast are the 13-Inch “Early 2015” MacBook Pro models compared to one another? How fast are they compared to the models replaced? Releasing the Early 2015 MacBook Pro models puts emphasis on the increase in optimal performance from its predecessors and not just on improved graphics with the Retina Display.   In Apple’s official statement back in 2015, the upgrade makes the new models — “Early 2015” Retina Display MacBook Pro: (1) MacBook Pro Core i5 2.7 13-inch model, (2) Core i5″2.9 13-inch model, and (3) Core i7 3.1 13-inch model — with up to two times faster flash…