Stay with the passage beyond the apex
One rider arrives first, but the other catches up before the straight. Seen together, the two films give that sequence a beginning and an outcome. You can watch the entry again knowing what follows, instead of judging its speed from a clip viewed on its own.
The comparison can involve two of your laps or a recording from a coach or friend. When someone explains how they approach a section, having their film beside yours makes it easier to locate the point they mean. You can stop there and look at both views.
Camera position and field of view affect the impression of speed and distance. Common track markings provide a better reference for the comparison than how dramatic either film looks.
Use the films already on your laptop
Onboard Studio plays local files in your browser. Basic comparison is free, the videos stay on your device and no Pulse recording is needed. An older film can be useful here, provided it shows the same section you want to compare.
The clips do not have to start together. Position them independently at a common reference and their playback can begin from that point. Slower playback and frame-by-frame viewing help with movements that are difficult to follow at normal speed; the alignment how-to explains the controls.
Measure the advantage, then follow its change
Rider Pro adds split timing through Wait For Me. Measuring the difference at chosen references shows whether the advantage grew or shrank between those points. The split-timing guide covers the waiting and marking procedure.
A growing gap creates another problem: the films stop showing the same part of the circuit at the same time. Marked splits support synced replay, bringing corresponding sections back together. You can examine a later passage without carrying the whole earlier separation into it.
Did the rider who arrived first keep the advantage beyond the turn? You have both the footage and the measured differences to examine the result, rather than rely on which entry looked faster.