If GOD EATER 3 generated the same gross revenue on the Epic Games Store, BANDAI NAMCO Studios Inc. would keep approximately $11,869,172 - that's $2,355,673 more than on Steam.
At this revenue level, Epic's concrete platform fee would be $1,482,160. 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 $9,345,933.
Note: This is a hypothetical comparison. Actual sales volumes differ significantly between platforms, and Steam's larger user base typically drives substantially higher sales.