Michael,
If the variant actually has differences from the standard, you could (assuming UNIX) do a diff or sdiff on the files that make up the variants.
Since there could be multiple files depending on how the variant differed from the standard, it would mean multiple diffs.
You could also use Ultra-Edit if you have it to point to the files via FTP and use Ultra-Edit’s difference checker.
If there are no differences from the standard (meaning there are no segment, or messages, or fields entries in the respective directories) then they are, by definition equal (assuming same HL/7 version)
email: jim.kosloskey@jim-kosloskey.com 29+ years Cloverleaf, 59 years IT - old fart.