whatss the dif btween the twilight dvd, blu ray disc, and hot topic dvd?

[swimmingrox2002_2006]

ok so im confused.
the twilight dvd had a bunch of special features but someone said the twilight blu ray disk has all the features and a new moon teaser trailer
so do they both have it?

and also whats different about the hot topic dvd thts being sold it supossedly has extra stuff too