Busy Time
Focussing on the Photoshop tests a little more, we want to see low, consistent busy times. Both drives produce this, but G.Skill doesn't have the blazing-fast performance that benchmarks such as ATTO and CrystalDiskMark indicate.
Our observations in the latest tests show that reading speed is roughly analogous to a top-tier SATA drive. The writing ability, however, is markedly better.