I think I have made a mistake in the C2 error reading capability between the two.
I thought I had seen the performance difference in the CDR-Info Writing Quality article:
BUT, it was between: 48125W and 52246S (p. 105 of the above article). And even that difference in C2 accuracy could be just down to statistics (I think only one test reading per drive was performed to produce those results).
So, in fact I cannot know for sure how the 48246S C2 reading performance is compared to the 52246S on the hardware side.
And, I still don't have conclusive proof that just the firmware between the two are different.
Also, while trying to find again the pages on which I think I saw a proof of the better media compatibility when writing (less C1 on various media) of 48246S, I stumbled onto this:
http://club.cdfreaks.com/showthread.php ... AND+errors
Then I tried to find the information which compared the above two drives in writing quality, but couldn't. I was sure I had seen it somewhere, but can't find it anymore.
CDFreaks has only tested 52246S whereas CDRLabs has only tested 48125W.
CDR-Info has tested SONY CRX220E1 (firmware upgraded CRX215E1, which is a LiteON OEM AFAIK) and they've found out it's C2 reading capability to be very high:
http://www.cdrinfo.com/Sections/Article ... =0&index=3
CDR-Info has not tested any LiteOn 48x or 52x models with the original (non-overclocked firmware).
Then again the high C2 accuracy may not be of use, if the optical mechanism and servo quality isn't very good:
http://www.cdrinfo.com/Sections/Article ... =0&index=5
So I don't know really what to do... What I would like to find (in the perfect world) is:
1) best optical pickup performance (avoids as many read errors as possible through superior reading)
2) best C2 reporting and correction performance (reports all errors it faces and errors it cannot correct).
Speed is really of very little importance to me, as long as DA reading speed does not fall a lot below 0.5x. I want accuracy, accuracy, repeatability, reliability, accuracy and NOT just speed.
I'm not convinced that 52246S (and perhaps 48246S) fulfill but the second of these requirements.
My apologogies if I've taken this a bit off-thread, but this is the reason why I wanted to identify the possible hardware differences between 48246S and 52246S.
I welcome any comments and corrections.
PS To repeat again, for those new to this thread: I'm not interested in overclocking 48246S to 52246S, I want to know if they contain the same hardware and if 48246S is at least as good in C2 accuracy as 52246S is. Or more generally, which drive is the most accurate in reading scratched discs, reporting back found C2 errors and correcting them.