Distinct vs Unique

Source Unique Distinct
List _____ List _____ List
Mark Mike Mark
John Adam John
Mike Joe Mike
Adam Chris Adam
John Joe
Mark Chris
Mark
Joe
Chris

Unique
Code:
let
    Source = Excel.CurrentWorkbook(){[Name="Table1"]}[Content],
    Group = Table.Group(Source, {"List"}, {{"Count", each Table.RowCount(_), type number}}),
    Filter = Table.SelectRows(Group, each ([Count] = 1)),
    Unique = Table.RemoveColumns(Filter,{"Count"})
in
    Unique
Distinct
Code:
let
    Source = Excel.CurrentWorkbook(){[Name="Table1"]}[Content],
    Group = Table.Group(Source, {"List"}, {{"Count", each Table.RowCount(_), type number}}),
    Distinct = Table.RemoveColumns(Group,{"Count"})
in
    Distinct