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
If you want more, Fedora is also using XZ compression by default in the next release as well. My point is simply that catching up is bound to happen on both sides.