Is the Sony DWD 26A an OEM version of the DRU 720S? The info I have found suggests the DWD 26A has slightly better access times (if accurate). Being one of Sony's OEM lines, Sony seems to have NO info about this drive. Does anyone know which (if any) LiteOn drive this compares to? Are firmware upgrades likely to cross over from a LiteOn sister or Sony's DRU 720A?