Crazy isn't it? The differences between even minor revisions of the "same" drive can have a huge affect on how it rips. It's really not an area that's transparent from the manufacturers.
I know Plextor used to be very highly regarded, but I'm not sure what they are like these days.
I do always try to rip at a lower speed where I can though, I've found that can help a lot on some disks.