[ubuntu] Question about creating partitions when more than 1 user profile will be made

I want to create 1 user profile for main office use (encrypted) and 1 for everything else (going online for updates, research, etc.; still all office use but not the important work and data). Is it better to create a separate /home partition for each user profile, or for the 2 user profiles to share the same /home partition?

Specifics: solely Ubuntu 14.04 (no Windows at all), entire volume of an SSD will be used, will be setting to Legacy BIOS if possible.