If No Rest for the Wicked generated the same gross revenue on the Epic Games Store, Moon Studios GmbH would keep approximately $41,909,780 - that's $6,793,490 more than on Steam.
At this revenue level, Epic's concrete platform fee would be $5,578,606. Epic charges 0% on the first $1 million in annual per-app revenue and then 12% on the remaining amount. On GOG (30% cut), the developer would earn approximately $33,241,871.
Note: This is a hypothetical comparison. Actual sales volumes differ significantly between platforms, and Steam's larger user base typically drives substantially higher sales.