In general, the protocol stack based on SUA is less complex and more efficient compared to the protocol stack based on SCCP and M3UA. Consequently, SUA can enhance the efficiency of the core network and can provide the means for simpler implementations.

	M3UA	SUA
SCCP Flavors	The signaling point is required to support different flavors of SCCP if it has to interoperate with different national systems.	This problem is eliminated using SUA.
Implementation Complexity	M3UA needs the SCCP services.	One protocol layer less. The elimination of SCCP reduces the complexity of the network node (implementation as well as management), therefore reducing costs.
Routing Aspects	In M3UA the message is handled from point code to point code.	SUA allows the IP network to route the messages using global title information.
Addressing Aspects	Using M3UA each IP node is required to have both the IP address and point code assigned to it.	Using SUA each IP node does not consume scarce point-code resources.
ISUP Services	Supported	Cannot be supported

As we can see, in general, SUA provides a better solution. SUA provides much better scalability and flexibility for signaling network implementation in all–IP network compared with the SCCP/M3UA option. The powerful addressing and routing capability of SUA can greatly reduce the signaling transfer latency.