to answer your question regarding " how does Imgburn produce better burns than other apps "
its because its being constantly updated , theres a lesser chance of a bad burn than most other burning softwares ( to namely Nero, <spit>) .
for this reason alone, its more advanced than DVDD was .
lets not forget ImgBurn will happily do dual layer discs, whereas DVDD ended whilst Dual layer was in its infancy .
as soon as any kind of bug is found (which is fairly rarely) its corrected and tested thoroughly , then if need be a new version is released
software like Nero likes you to pay for its "new updated version" then you have to find all the bugs for them ,and waste your discs in the process
i think you will find its the majority of beta team and general users who state "it gives better burns than DVDD did "
also, you get the use of this support forum, where your questions are answered very quickly if you poat witha problem , unlike Nero