In a nutshell - you get pointed to the suite capabilities because there is a lot of integration between the products. But here's a very high level overview....
Foundation - Health, Workloads and Faults monitoring and alerting
Standard - Same as Foundation PLUS Anomalies and Capacity Analysis
Advanced - Standard PLUS ability to add third party adapters and use adapters for vCM and Hyperic
Enterprise - Essentially same as advanced but the suite license provides for the ability to monitor more within the guest OS using other tools within the suite (Hyperic and vCM).
Does that help, or do you need more detail?
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