Both documents have the same content, the difference is just the usage-rights:
The "Single User" edition of our spreadsheets may only be used by one person and may not be copied or shared (e.g., via shared drive, posted on Sharepoint or other website, distributed through e-mail, etc.). You are granted the right to copy it to a backup device, but this backup device (e.g., CD-ROM, Flash drive, backup tape, etc.) may not be used by others to read or utilize the spreadsheets. The intellectual property (IP) remains with Network Frontiers LLC and Latham & Watkins LLP.
The "Corporate" edition grants you the right to copy and distribute the spreadsheet within your corporation. The intellectual property (IP) remains with Network Frontiers LLC and Latham & Watkins LLP.