Yes, they look the same, apart from missing the "QC Passed" label
. But it really seems to be a hardware issue. I also tried them in the pc with 3 different sata drives and they simply do not work. For some the drive identifier is displayed correctly on the bios screen. Booting is impossible though and if I boot a system from a different drive while another one is attached to the converter, the system won't boot: Windows 7 just hangs and Linux kernel reports a lot of errors on the device/bus.
This is kinda unnerving. I now have 5 adapters and none works.