Process Lasso is telling me the incorrect CPU usage, I have "Show CPU Utility % instead of CPU Time %" on yet it still tells me the different values from task manager.
(https://i.imgur.com/tq1bGNI.png)
The per-process values are CPU time % and will match the Task Manager's "Details" view, where it also shows that.
CPU utility % is only shown in the graphs and status bar.