I have experience with all of the media involved here. The media codes on the BenQ media are:
BenQ 8x DVD-R: Sony, 16x overspeed supported on many burners incl Pioneer, etc
BenQ 4x DVD-R: Sony
BenQ 8x DVD+R: Daxon AZ2, overspeed 16x support on DW1620, others?
BenQ 4X DVD+R: Daxon AZ1
Daxon is BenQ's related media division. The -R media is always a great value and a solid choice for any burner.
As for the Kodaks, let the rant begin. None of this media is actually produced by Kodak, it is just "licensed." I have received the 4x junk media (MEDIAID001) in 8x packaging and promptly returned it. I received the same media under Future Shop's Cicero brand and it is the worst media I have ever used; even visually it looks like junk with wavy, inconsistent dye. I keep a spindle around for amusement as my "acid test" for burners. The latest NEC 3500A firmware only supports that media code at 2.4x. It burns horribly (most are coasters especially beyond the 4G range) and does not work well with any burner I own or have owned, and that includes (misc brands incl. Liteon, LG, Pioneer, BenQ and NEC) 812S, 1633S, 4120B, 4160B, 4163B, DVR-109, DW1620, ND-3500A. These tests were all with final or near final firmware versions. In the beginning I bought some small packs of 4x Kodak media and they were Prodisc which burned with excellent quality, and was sometimes 8x certified media as well. As was mentioned above, buy the Vakoss from Best Buy as they are always Prodisc, always 8x certified and are an excellent value.
The Kodaks seemed to be better in the beginning, including with their CD-R media. I picked up an initial CD-R spindle wondering who this "licensed" media would actually be produced by, and it was Gigastorage. This initial media had a nice branded surface and actually turned out excellent quality burns. I picked up another pack the next time they were on sale, and it was unbranded surface discs produced by CMC (I hate CMC CD-R media, skipping probs on mix CD's is what got me started on all this media testing and analysis). So basically this "licensed" Kodak product seems to be going to the dogs quickly and you don't even know if what the packaging says will actually be inside, or even of reasonable quality. Don't waste your time with the Kodaks, they shouldn't be rewarded for this inconsistent and apparently spiralling quality, which appears to be a profit-driven destruction of their storage media reputation. Apparently some packs are produced in India as well, but I have no experience with these. Regardless, it's a crapshoot, and the bottom line is it shouldn't be with a brand like Kodak.