Table value comparsion

You can use List.Difference so, intially removed the column Date on the second table, then convert each one into a list by Table.ToRows, then use the List.Transform.

to see the preocess, just copy the next code into the advance editor

let
Table1= Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMlTSUTI1MFCK1YGwzaBsIyRxMNvUFM5GVmNuCmEbw8RjAQ==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [#"MS-ID" = _t, #"AC-ID" = _t]),
    Table2 = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMlTSUTI1MACShob6hvpGBkYmSrE6KOJGyOJGKOpN0SRMTUESEPWmcGEzsHojfSOocCwA", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [#"MS-ID" = _t, #"AC-ID" = _t, Date = _t]),
    Custom1 = List.Difference(Table.ToRows(Table1),Table.ToRows(Table.RemoveColumns(Table2,"Date"))),
    Custom2 = Table.FromRows(Custom1)

in
    Custom2

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