When comparing Perforce vs ClearCase, the Slant community recommends Perforce for most people. In the question“What are the best version control systems?” Perforce is ranked 9th while ClearCase is ranked 13th.
Ranked in these QuestionsQuestion Ranking
Pro Multi platform availability
Pro GUI and Visual Studio integration available
Pro Central repository/server
There's a central repository and a clear path/protocol how to reach it.
Pro Dynamic views
MVFS filesystem is a good approach for configuring a custom view to your files
Con Closed Source
Branching becomes a pain due to its non-distributed model
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.
ClearCase is file-centric without UCM module
ClearCase is very slow