If NBA 2K25 generated the same gross revenue on the Epic Games Store, Visual Concepts would keep approximately $54,058,015 - that's $8,023,456 more than on Steam.
At this revenue level, Epic's concrete platform fee would be $7,235,184. 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 $42,905,239.
Note: This is a hypothetical comparison. Actual sales volumes differ significantly between platforms, and Steam's larger user base typically drives substantially higher sales.