A look at the differences between the two options related to changed assets (All new or changed assets under a particular path and All new or changed assets under a particular path since this rule was last executed) for asset-based rules.
To begin with, you typically use All new or changed assets under a particular path since this rule was last executed only after you define a rule that uses All new or changed assets under a particular path. The All new or changed assets under a particular path since this rule was last executed rule uses a different change detection mechanism than the other change detection rule. A rule that uses All new or changed assets under a particular path is affected by any change to an asset in the specified path. On the other hand, a rule that uses All new or changed assets under a particular path since this rule was last executed is affected only by its own previous executions. With this rule, a changed asset picked up by one rule is not considered a changed asset by another rule, and each rule considers every asset to be new when it is first executed.