Oracle expertise
Having dealt with many DBAs waiving around the "install guidelines" for Oracle DB and pointing out why unlimited anything is a bad thing (tm) there was never ever a chance of me allowing an Oracle supplied Java installer to run on any machine I owned, regardless of whether its wrapped in a .deb or a .rpm.
I have very little trust in them and absolutely no faith they can get it right. The tar balls and two soft-links are all I've ever needed to get a running Java environment and as it is that easy I keep some of the older tar balls by in case of any compatibility issues.