There are several ways to compare activity between different accounts.

Comparing Multiple Accounts in a Network

If you have multiple accounts in a social network, you can use channel reporting to compare activity and toggle between the accounts. Go to Channel > Select the network > Under Activity Timeline, click to unselect the account you want to remove:

Facebook Activity

You may also click the dropdown on the right side (Showing # of # Profiles) and uncheck the account from there:

Showing # of # Profiles

Cross-Channel Summary

If you go to Cross-Channel > Summary > Profile Comparison, you'll find the channel activity across all social profiles. The graphs are completely interactive and you can simply unselect the profile to remove it from the graph:

Profile Comparison 

Cross-Channel Profiles

Under Cross-Channel > Profiles, you'll find a summary of different activities across all social profiles connected to the project:

Cross-Channel Profiles