I just bought a OCZ Vertex 4 and a Samsung 830 [one for the Mac Pro] and another for a USB 3 enclosure that will be used with my new MacBook air. Is there any real world speed that I would see between SATA II/III when using Lightroom and Photoshop? If so, is there any reason to get a USB3 card for the Mac Pro and just mount the drive in an external enclosure versus on the native bus?