Both of these virus releases look like they have been tweaked by some script kiddie somewhere. The differences in coding between these releases and the originals are marginal, and near enough come down to keys being put in a slightly different place, files having different names, and variables being constructed in a new way.
Nothing new, and actually quite boring.

Interesting fact :

Around 1997-1998 when the biggest threat were macro viruses, some clever fellows started to release virus SDK's. The company i work for analysed one of these kits, and within one week we identified a possible 15,000 viruses from this one kit. We detect them all with 3 identity files.

The majority of viruses we see on a day to day basis are variants of viruses. These have normally been changed by kids. For example the kid that "created" Blaster-F. Bet he wished he hadnt changed the file name when the FED's came knocking at his door.