There is no noticeable performance difference (read/write/access speed) on "normal" systems for internal devices, in a top class server even shaving off a few milli-micro-nano-pico seconds from each operation may make sense, but on a normal PC that is largely pointless, you can (and will see) differences on external (USB 2.0) devices such as USB sticks, CF cards and similar, as they are much, much slower and with rotating hard disks, as well, particularly the laptop ones that are slowish, not on internal SATA 3 SSD's that are usually stupidly fast.