The sunburst computes aggregate sums on paths like "init-ready-intent-attempt-success". The timeseries graph asks questions about medians of rates like "paths that include success divided by paths that include ready". The details are in T88369 and T88367 respectively.
The problem to be solved here is one of UX. The two visualizations have to be able to work together in an intuitive way so James and team can find it useful for daily work.