I see three videos and I don't see any mention of how much electricity they use? Looking up the fridges myself, a Sub-Zero BI-42UFD/O is rated at 693kWh yearly

I see three videos and I don't see any mention of how much electricity they use? Looking up the fridges myself, a Sub-Zero BI-42UFD/O is rated at 693kWh yearly, and a Frigidaire FG4H2272UF is rated at 671. There's no difference.