To answer your direct question Mr_Bill, I didn't feel like unhooking all of the wiring and carrying my MacPro Desktop downstairs to perform the test that you're referring to, because I felt that I wouldn't ever use this large tower Computer in the Living Room anyway. However, through my PC Audio setup, the answer to your question is above in this thread.
For what it's worth, I also compared the MBL 1621A transport to the Logitech Transporter and although the MBL 1621A was clearly better and 10 times the price, it certainly wasn't embarrassing for the Logitech, nor was it worth me getting up off the couch to change songs every few minutes. I would equate the sonic difference to, upgrading your stock power cables to high-end power cables. I should also mention that all Interconnects and Power Cables were Kubala-Sosna Emotions, and the Digital Cable was a K-S Emotion 110 ohm AES/EBU.
Rich