2015 MacBook Pro SSD Speed = Awesome
Authorized Apple dealer B&H Photo loaned MPG the Apple 15.4" MacBook Pro Retina (Mid 2015), 2.8GHz / Radeon R9 M370X / 16GB / 1TB, the configuration MPG recommends for power users, photographers, videographers, etc. Save money on AppleCare too.
The performance of the 2015 MacBook Pro with its 1TB flash drive sets a new standard among all Macs. The speed gains come by virtue of using the new SATA Express design; this is not something that can be had by upgrading a flash module in an older Mac.
Internal Flash Drive / SSD Performance vs Late 2013 MacBook Pro
Real World Shootout: IntegrityChecker Verify
disktester run-sequential-suite --iterations 5 --test-size 8GB