Compare your lap with a team mate
Put a team mate's best lap on the charts beside yours, in their own colour, and see corner by corner where one of you gains on the other.
Get their runs onto your PC
The easiest way is one shared Google Drive folder the whole team saves into. Add it once under Settings › Folders..., and every run anyone drops in shows up.
Pick their run
Open your own run, go to Charts, and choose More › Compare with a team mate. It lists everyone else's runs at this track, newest first, with the car named when it differs from yours. Pick one.
Sample names.
Read where they gained
Their best lap goes straight on in their colour, beside the lap you are comparing to, and the rest of your laps are tucked away so the two can be read. On Time loss, wherever their line drops below zero they are ahead of you - and the steeper it drops, the more they are gaining.
Sample data.
Tip: add up to four team mates. Each gets their own colour on every chart and in the lap list, and Clear comparisons takes them all off again. Comparing the same car at the same track gives the fairest picture.