I've got everything from TitD except the two splits and Blue Blood. However, the two splits both have stuff that is found on Sadness Will Prevail, all except for one song which is nothing more than samples of some dude talking if I remember correctly. I don't have Blue Blood, but I'm not really after that one since I have all those songs on their studio albums.
THe ones I have are Supernova, Willpower, s/t, Live Till You Die, Temple of the Morning Star, In the Eyes of God, SWP, and Kiss the Pig.
Kiss the Pig is more of a back-to-basics kind of record, and IMO, is nowhere near ItEoG or SWP.