Can you please mention some advantages & disadvantages ?
Why "you would go with LG" ?
I guess from what i have read that the major differences between them are:
1)LG uses P-CAV for 16x while NEC uses CAV so the LG is a little bit faster.
2)LG reads DL at 8x while NEC at 4x
3)LG reads/writes DVD-RAM while NEC cannot (i don't know if anyone cares
4)LG doesn't support DVD+RW bitsetting
5)LG rips SL DVD-VIDEO at only 10x (i guess riplock in firmware)
6)Generally NEC drivers are considered to be horrible readers, but in the cdrinfo
review is mentioned that the 3520 is a very good reader.
7)Judging from the cdfreaks review the LG has great quality and i believe NEC
has the same quality.
8) NEC has a very active community so there is a firmware for every need you
may have (3520 has not many firmwares because it is relatively new, but it will
have in the future)
I don't own any of two so i cannot recommend one to you.
I am thinking of buying one of the two myself, so i have done a little research
in the forums here.
This information i mention is from the forums here and from reviews from here
If something i said is wrong, feel free to correct me.
the NEC 3520 has not yet a full review so there is not much information about it
if you want DVD-RAM then you must go with LG.
if you want to copy protected discs the LG gets "2 sheep" (can copy fine 2.5 safedisc but not 2.8/2.9). I don't know about the NEC rating.
Speaking for myself, i like very much lg products. I have 2 LG monitors and i
am very happy with them.
I would get the LG if not for one thing. Firmwares.
With NEC modified firmwares there is no riplock,no rpc2,there is media
overspeeding. LG supports some 8x -> 12x overspeeding from what i read.Also, there is rpc1 A101 firmware from TDB