Hi @nmarques
By definition:
• Standalone—The device is not connected to any other device and
does not have a stack port.
• Native Stacking—A device can connect to other devices of the same
type through its stack ports to form a stack. All units in a native stack
must be of the same type (either all Sx500s or all SG500Xs).
The main different is the stack port.
-If I helped you somehow, please, rate it as useful.-