Ruel,
Based on the information from the SCP website, it looks like it addresses network security only. The CISSP certification, on the other hand, is a more comprehensive coverage of overall security issues and requires verification of sufficient past experience in one or more of the 10 knowledge areas just to qualify for the exam. In order to eliminate the "paper CISSP", effective June 2002, experience claimed on the exam application must be verified by a third party in a position to know your background and who can attest to that experience. The SCNP doesn't appear to require past experience, although the scenario test for the SCNA would imply that some experience is necessary to pass this exam. As to which one is better, it depends on your specific needs and interests. The SCNP/SCNA series appears to be targeted more towards the technician/administrator level, while the CISSP is geared more for Security Officers, IT Managers and CTO/CIO level personnel. As with all things certified, YMMV, so only you can make the call as to which path is the best choice for you.
Good Luck in your endeavors,
Joe
Joseph B. Baugh, PMP, CISSP, CCNP, CCDP, CCSE, CUE
Network Services Manager, Sierra Southwest Cooperative