I recently bought two 4X-10X CD-RW. They are Sony CD-RW650HS
and Acer RWHS74. Previously, I used the 4X-10X LiteOn CD-RW74 that
was bundled with LiteOn LTR-12101B.
Currently I am using Easy CD Creator 5.01 and Nero Burning Rom
5.5.4.0.
I have some inquiry about the above CD-RW. Below is a simple study
that I had made.

Blank Blank* Formatted~
Sony 679,477,248 683,827,200 555,155,456
Acer 679,477,248 688,384,000 558,891,008
LiteOn 679,477,248 688,281,600 558,825,472

* with directCD activated
~ UDF format

1. Why there are differences? Any detailed explaination?
2. After formatted in UDF format, using CR-RW drive the discs were
checked with Nero CD Speed-CD quality check. Acer and LiteOn
CD-RW completed the check process. However, Sony CD-RW failed
everytime. Here was the error,

[14:09:52] Initializing
[14:09:58] Starting CD quality check
[14:15:18] Read error at 60:50.60 (code 030600)
[14:15:18] Test aborted

Then I switched to ScanDisc by directCD. The disc returned no
error. Infact, the disc performed well in read and write mode.
What is actually happen to the Sony CD-RW? Would it contains
error as reported by the above quality check?
3. When checking the CD quality, I found different results by using
CD-ROM and CD-RW drive. Which drive should one use for CD quality
checking? CD-ROM or CD-RW drive?

It is probably your media, direct cd does not do extensive checks and may be writing bad data if it goes oer 60 minuts on that dsc maby a different disc (might be defective) I recommend switching to a better brand, like the Fujifilm ones, what yo do is:

Check where the fujifilm discs you buy are made: japan is the right one buy those

2. stop using you other discs, some good companies subcontract with bad ones do NOT go by the label name when browsing

(in reply to ckl1998)