I boot from my GTech mini USB3 to do repair stuff on my MBPr periodically. It feels as though time is standing still while I wait for it to boot from this external USB3 drive. Felt like my old FW800 was faster with previous MBP but don't have this port on my 2013 MBPr. Looking for faster alternative. Would it be faster to use a USB3 enclosure with something like a Samsung 840 EVO SSD or to use a Thunderbolt enclosure (I know there are precious few of these) with a 7200 RPM HDD? I've looked at the GTech Thunderbolt mini drive with 7200 RPM HDD but was assuming the HDD speed would be the rate limiting step and wouldn't get anywhere near Thunderbolt speeds out of it. Is that correct or would it be considerably faster than USB3 version of the same drive? Then compared to a USB3 enclosure w/ SSD? Thanks for any feedback.