I have two identical LiteOn 1633s drives (work and home) that produce quite different results using the same media. See this thread:
I have been trying some new media at work to try to find some less expensive media that still produce good results. I seemed to be getting mediocre results using Sony 8X media with the burner @ 1653s CSOP, so I decided to try the Sony firmware (DRU-710A @ BYX4) (no eeprom reset). My first burn was decent, and the second burn really good. Same results with RIDATA 8X media. Best results after 2 burns that I have ever produced. Still poor results with Benq (Daxon AZ2) media, however.
I have been getting acceptable, but inconsistent, results using the same Benq media at home. So I decided to flash upgrade from 1633s @ BSOS to Sony DW-D22A (or DRU-710A) BYX4. Immediately I got a great improvement. I've attached two Nero scans, burning the same movie, one from the last burn using the 1633s firmware, the other the 3rd burn using the Sony firmware.
The Sony firmware seems to quickly produce good results (even after the 2nd burn) - I am impressed so far. Hopefully the results will not drift as much as the 1633s firmware results did for me.
Anyone else have good luck with the Sony firmware on their 16sss/1653s??