Nero does not want to change write modes or verify?

what are all the differences between : TAO, DAO, SAO, RAW SAO, RAW SAO 16, RAW SAO 96, RAW DAO 16, RAW DAO 96 ?

isn’t there an advantage to always writing an ISO in RAW DAO 96?

Also, why will nero not allow me to actually change modes at all or even verify the burn from an ISO I created using sonic?