The DL20 Gen10 Plus is uniquely identified by its compact 15" depth and support for Intel Xeon E processors, designed for space-constrained environments. The DL560 is the only four-socket (4P) server listed that fits in a 2U chassis, distinguishing it from the others. The DL345 is a 1P (single-processor) server utilizing AMD EPYC processors, which are known for providing a high core count and large memory footprint in a single socket. Finally, the DL180 Gen10 corresponds to the standard 2P 2U description, highlighting a balance of performance and expandability for diverse workloads.

HPE ProLiant DL20 Gen10 Plus Server - QuickSpecs

Reference: Overview section stating, "The HPE ProLiant DL20 Gen10 Plus server delivers a compact, versatile server... 15.05 inch depth chassis."

HPE ProLiant DL560 Gen10 Server - QuickSpecs

Reference: Standard Features section describing it as a "High-density, 4-socket server with high performance... all in a 2U chassis."

HPE ProLiant DL345 Gen10 Plus Server - QuickSpecs

Reference: Product overview describing it as a "Single socket 2U server... providing a high core count and large memory footprint."

HPE ProLiant DL180 Gen10 Server - Data Sheet

Reference: "Adaptable for diverse workloads... the secure 2P 2U HPE ProLiant DL180 Gen10 delivers world-class compelling performance..." (Document ID: a00021862enw).