When comparing Perforce vs Bazaar, the Slant community recommends Bazaar for most people. In the question“What are the best version control systems?” Bazaar is ranked 7th while Perforce is ranked 9th. The most important reason people chose Bazaar is:
It is quick to learn, you don't need to memorize lot of commands to do your job.
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Pros
Pro Multi platform availability
Pro Central repository/server
There's a central repository and a clear path/protocol how to reach it.
Pro HelixCore
Helix Core for GIT large files is free for up to 5 users.
Pro Solid workflow for binary files
Perforce has shown itself as very capable when it comes to managing binary files. That's why it's still the go to version control system in game development.
Pro GUI and Visual Studio integration available
Pro Simplicity
It is quick to learn, you don't need to memorize lot of commands to do your job.
Pro Tracking empty folders
With Bazaar you can track empty folders without the need to put .keep files in them.
Pro Full support for renaming
Renaming of a file is fully supported, not a hack like removing a file and adding back under another name...
Cons
Con Closed Source
Con Does not work offline
You must be connected to the internet to do anything useful. Although, there is a Git <-> Perforce bridge that sorta solves the problem.
Con Centralized
Branching becomes a pain due to its non-distributed model.
Con Slow developement
Bazaar tends to have a slow update cycle with Canonical. Version 2.6 was released in August 2013 and branch 2.7 was not finished until Feb. 2016.