Still €21 more than the monthly-average contract. (€396 on spot, at 11.3 ct/kWh averaged over the year.)
What this assumes.That the last year repeats, which it will not. That your consumption follows the shape you picked above — a stylised one, not your meter. That the monthly-average contract charges the month's mean spot price, which is what those contracts do. And that moving load costs you nothing, which is true for a dishwasher and false for a family dinner.
Both figures are the ENERGY part of the bill only. Grid fees, energy tax and your supplier's markup are excluded from both sides, so the DIFFERENCE is meaningful even though neither total is your bill. We do not recommend a supplier and take no commission.