Flow action

Add the action Compare Lists. Each run compares one pair of lists.

How a match is decided

List 1 is apple;banana;cherry. List 2 is banana;date. They share banana.

Setting	Is Matched
Exact Match is true	False. The lists are not the same set.
Exact Match is false, minimum is 1	True. One shared value meets the minimum.
Exact Match is false, minimum is 2	False. Only banana is shared.

When Exact Match is true, Number of Required Matches is ignored. A blank minimum is treated as zero.

Inputs

Input	When to set it
List 1	One value, or several separated by semicolons. A multi-select picklist already looks like this.
List 1 Collection	A text collection. Combined with List 1 when both are set.
List 2	Same as List 1. Leave it empty when you only want the distinct values of List 1.
List 2 Collection	Same as List 1 Collection.
Exact Match?	Always. True when both lists must contain the same values, ignoring order.
Number of Required Matches	When Exact Match is false. Is Matched is true when the shared count is at least this number. A blank number is treated as zero.

A collection item is one value, even when the text contains a semicolon. The text input splits on semicolons.

Outputs

Output	What you get
Is Matched	True when the exact-match or required-match condition is met.
Number of Matches	How many distinct values appear in both lists. This is the count compared with the minimum.
Matching Values	Those shared values, sorted.
Unique Values List 1	Values in the first list that are not in the second.
Unique Values List 2	Values in the second list that are not in the first.

Spaces around a value are removed. Blank values are dropped. Duplicates count once. Red and red stay separate.