run it

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diff --git a/src/libsystemd/libsystemd-internal/sd-bus/DIFFERENCES b/src/libsystemd/libsystemd-internal/sd-bus/DIFFERENCES
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+Known differences between dbus1 and kdbus:
+
+- NameAcquired/NameLost is gone entirely on kdbus backends if
+  libsystemd is used. It is still added in by systemd-bus-proxyd
+  for old dbus1 clients, and it is available if libsystemd is used
+  against the classic dbus1 daemon. If you want to write compatible
+  code with libsystem-bus you need to explicitly subscribe to
+  NameOwnerChanged signals and just ignore NameAcquired/NameLost
+
+- Applications have to deal with spurious signals they didn't expect,
+  due to the probabilistic bloom filters. They need to handle this
+  anyway, given that any client can send anything to arbitrary clients
+  anyway, even in dbus1, so not much changes.
+
+- clients of the system bus when kdbus is used must roll their own
+  security. Only legacy dbus1 clients get the old XML policy enforced,
+  which is implemented by systemd-bus-proxyd.
+
+- Serial numbers of synthesized messages are always (uint32_t) -1.
+
+- NameOwnerChanged is a synthetic message, generated locally and not
+  by the driver. On dbus1 only the Disconnected message was
+  synthesized like this.
+
+- There's no standard per-session bus anymore. Only a per-user bus.