The difference isn’t as wide though. The greatest drain on an EV after traction in winter is heating. A petrol engine provides heat as a bi-product of combustion so comes for free.
Yes, this has been a problem in some of the hybrids where it either takes an age for the car to warm up or with the PHEVs the petrol engine has to be running to have heat.
Some EVs use a heat pump to make the heating much more efficient, mine has one, but as temperatures dive sub-zero even a heat pump isn’t so efficient. The trick here is to precondition the car whilst connected to the mains electricity so it starts off nice & toasty and the rest is just maintaining that.
Preconditioning is one of the most desirable features of EVs when fossil car drivers are scraping the ice off the windows whilst you are looking up from your breakfast to see your car de-icing itself & heating itself before you even leave the house.