You can do it in Linux using only PHP, but need to install ODBC drivers in it.
I can do if you provide me SSH access to your server, so I can install it and deploy the php files, otherwise won't do.
You need to tell me what differences you wanna check between files, and what will be the file names so the script/mini site can check it.
Hope we can do business together,
Best Regards,
Vinicius