Quality enhancing features

what are the various quality enhancing features?

I know plextor has powerrec which is a combo of laser, speed adjustments in response to burn quality
benq has solidburn and WOPC, which I think does the same as plextor’s powerrec
NEC has AOPC, which is just OPC in response to laser power/reflectivity and not quality?
What about Liteon’s SMART-BURN which supposedly adjusts speed in response to burn quality (Even though it doesn’t always work very well), but I guess it’s not a form of running OPC?

what other features are there? an explanation of what the features do is good too

I think all of these “features” are explained on the manufacturers sites.

Have you had a look there??