At what resolution is Daphne running your rips, plz ? Technically, anything above 768p is HD.
However, to my understanding, Daphne won't support much higher resolutions than 480p.
Also, if you don't have the standard DVD of Dragon's Lair,
you won't be able to unlock the downloaded files & play from them (I am talking about the encrypted ones that download via Daphne Loader),
so in either case I can't really understand how you established your comparison.