If Danganronpa 2: Goodbye Despair generated the same gross revenue on the Epic Games Store, Spike Chunsoft Co., Ltd. would keep approximately $7,538,721 - that's $1,637,466 more than on Steam.
At this revenue level, Epic's concrete platform fee would be $891,644. 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 $5,901,255.
Note: This is a hypothetical comparison. Actual sales volumes differ significantly between platforms, and Steam's larger user base typically drives substantially higher sales.