BD is obviously better. This is without even thinking.
Having the BD hard-copy beats anything, one thing because you can rip off the original disc image inside (iso). HDTV, is after all, off the television and media, how can these 2 be compared, I cant fathom it.
definitely BD, for one thing its uncensored so there's no annoying ray of light or shadow ruining the scenes.
the downside is its late release and large file size... but i guess it'd be alright since u can dl it in mini-hd. that way a 720p will have the same quality but with the size of a 480p