Hi Anon,
The purpose is different and therefore you can't do that multiple note implementation via solman.
Implement via solman means you can implement with solman getting SAP recommendations for any managed system using solman features.
System Recommendation has whole bunch of option not only for security but many multiple other options
check below.
System Recommendations - SAP Solution Manager - SAP Library
there is also some improvement in 7.2 and you can check its relevant EGI.
But overall it will help you to compare and get guidance about missing sap notes on managed systems centrally via solman.
Thanks
Prakhar