More than that: they're different vatiables. One is actual, measured time and distance: this is how drivers are paid. The other is estimated time and distance wrapped up in a risk modeling / worst-case analysis: this is how riders are charged.
Estimation vs. measurement. The two converge in an ideal world where risk drops to zero and estimation methodologies are perfect.
Estimation vs. measurement. The two converge in an ideal world where risk drops to zero and estimation methodologies are perfect.