there are 2 types of launch consoles
ones which are built with faults then fixed with later revisions (microsoft)
and those that are built perfectly (sony)
if you take the mini cooper (bmw) as an example, the mini cooper was very successful at launch and sold out all over the world and had a 2 year waiting list. every mini bought in the first 6 months from laumch was solid.
bmw then started to speed up productions times and quality levels fell as they ramped up production to meet demand. everyone who bought a mini which was 6 months after launch got ones which werent built to the same standard and this happened for a long time after that too.
so you could buy something which is a later revision and it be worse, which is what happened with the ps3, the original consoles had backwards compatibility, 4 usb ports and a memory card hub built in.
the recent slim ps3 now has a better audio chip with more functionality but still only has 2 usb ports, no memory card hub and no backward compatibility.
so generally speaking launch consoles have been better when sony is the manufacturer, there was even an article stating that launch ps1's with a special audio output on the back were comparable to some £2000 cd players.
below taken from web
Conclusions
I expected one of those hip affordable products that sounds a little edgy or a little tinny, but gets the notes and beats really right. The truth was different. Sony's PlayStation 1 offered some of the least edgy, least tinny digital sound I've heard. And got the notes and beats really right.
Compared with the kind of performance I'm used to hearing from high-end CD players, the PS1 had a very un–hi-fi sound. Whether you think that's a good thing or a bad thing will depend on your point of view. If certain other audio reviewers are right, it may even have to do with the time of day when you were born.
I think it's a good thing. So does my wife, who thought the PS1 was consistently more engaging than any other digital player she's heard in a long time. If John DeVore doesn't mind, we're going to write him a check—the cost of shipping the player was about three times the cost of buying it—and we'll keep this PS1 for ourselves. (John has more.)
Partly because of my indifference to digitally mastered music, I admit to having less experience with cutting-edge CD players than do most of my colleagues. That said, if I owned any of a number of other digital source components, and if my daughter owned a PlayStation 1, I would offer her a trade—although I don't know what possible use she could have for the former, and I don't know if I could shake the guilt that comes from getting the better part of the deal. Perhaps if certain "high-end" CD players came bundled with a few games...?
so the proves that launch ps1's were better than any other ps1.
launch fat ps2's were better built than any other fat ps2 apart from maybe the test ps2 which was extremely rare and not available for sale.
so im going to go with the trend and say that launch ps3's were better built than any other fat ps3 and had more features apart from maybe test ps3's.
look here for more info on launch ps1's
http://www.msnbc.msn.com/id/15484873/