What are the differences between these two tools?
They are part of the same package: https://docs.microsoft.com/en-us/windows-hardware/test/wpt/
And they are using the same API I assume, but Microsoft does not state if they have differences and details on this.
Are they equal in the captured information? Are there some preferences in use-case scenarios when one should be preferred?
According to https://docs.microsoft.com/en-us/windows-hardware/test/wpt/
The Windows Performance Toolkit consists of two independent tools: Windows Performance Recorder (WPR) and Windows Performance Analyzer (WPA). In addition, support is maintained for the previous command-line tool, Xperf. However, Xperfview is no longer supported. All recordings must be opened and analyzed by using WPA
It looks like GPUView still has scripts that use Xperf, so perhaps Xperf is retained as backwards compatibility for existing scripts. But WPR is the newer tool meant to replace "legacy Xperf"
