Untyped: If a node is not configured with any node type, the node classification feature does not apply on that node. The node starts with the Untyped node type.Any default associations of agents to node types do not affect the behavior of agents, and the agents run based on the Data Agent Queue configuration for that node. The listeners do not have any default association to node types, but if you mapped them to a node type, they do not run if the node is started with the Untyped node type.
Queue Processor rules run on nodes to which you map these rules. If you do not define node types, you cannot map Queue Process rules to any node types. In this case, all the queue processors within your application run.
Universal: If you have only one Pega node, set it to be universal. A universal node supports both the DSM Stream Service and Queue Processor rules.
Difference between classifying a node as "Universal" and not classifying a node as Universal, that is leaving the default setting as "Untyped" in terms of system resource utilisation irrespective of number of server instances.