Even if they're both made by Plextor, don't you think that Plextor will hold a higher standard to the parts used in their own? Also if you check out the benchmarks, there is a distiguishable difference. The Plextor 161040a also has a fan that the TDK is missing. Just because a company makes a product for another doesn't make that product equal to the companie's own. The TDK drives can stand on their own merit and should. Furthermore people who whine about not getting what they paid for should read about the documented specifications first, and not complain that they didn't get what they were expecting. Sorry for the rant, but I believe if people want Plextor, then buy Plextor! It's not that much more $$, and it certainly is not inferior.