Multilib - Fedora has not installed both arch packages by default in a x86_64 system for quite sometime now although there is a simple setting to change if you prefer it.
DebDelta is not integrated into the distribution like DeltaRPM in SUSE and Fedora after that.
Separate patches - RPM has always used granular patches unlike Deb where usually many of the patches are put up into a single archive. This makes it harder to cherry pick some of them. I know this isn't always the case.
File Capability - Writing a script is fragile. Fedora is going to use this RPM capability by default in the next release