I oversee analytics on a few of these buses, the BYD model on sloped but mostly flat areas was averaging very consistently around 85 KWh per 100KM for average speeds around 30kmph (city traffic),
Attached is some of the raw data if anyone is curious, sadly pulling the slope data for the trips would be dipping a tad too far into revealing who owns them.
I have no clue where they pull the fraction of a cent per KM number from, based on even large scale rates, at 0.85KWh per KM, your still going to be paying multiple cents per km,
Standard buses end up around 33 Litres per 100KM of diesel for equivalent sized buses, Hybrids about 26. so 0.26 to 0.33 Liters per KM, Liquid fuels cost more, that is a given, but the gap is narrower than some would say.