The retail price is the same, sure, but the effective price is much different because the incentives come from different tax and rebate schemes that aren't factored into the retail price. EVs have no VAT in Norway, no road tax, no toll or ferry fees [0] -- that's a major difference in the effective price!
Sorry, thought you meant “initial” total purchasing price, if that makes sense. Road tax is back, this year. No ferry fee is only on Europe roads. No toll fee still. Also service cost is probably cheaper, as electric has less failing motor parts, not sure about the battery though.
[0] https://elbil.no/english/norwegian-ev-policy/