PropertyDifference 
    class PropertyDifference
Information about a resource property whose actual value differs from its expected value, as defined in the stack template and any values specified as template parameters. These will be present only for resources whose StackResourceDriftStatus is MODIFIED. For more information, see Detect unmanaged configuration changes to stacks and resources with drift detection.
Types
Properties
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                  The actual property value of the resource property.
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                  The type of property difference.
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                  The expected property value of the resource property, as defined in the stack template and any values specified as template parameters.
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                  The fully-qualified path to the resource property.