If Overcooked! All You Can Eat generated the same gross revenue on the Epic Games Store, Team17 Digital, Ghost Town Games would keep approximately $6,073,729 - that's $1,337,808 more than on Steam.
At this revenue level, Epic's concrete platform fee would be $691,872. 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 $4,735,921.
Note: This is a hypothetical comparison. Actual sales volumes differ significantly between platforms, and Steam's larger user base typically drives substantially higher sales.