If EA SPORTS FC™ 24 generated the same gross revenue on the Epic Games Store, EA Canada would keep approximately $182,736,642 - that's $19,721,513 more than on Steam.
At this revenue level, Epic's concrete platform fee would be $24,782,269. 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 $145,263,238.
Note: This is a hypothetical comparison. Actual sales volumes differ significantly between platforms, and Steam's larger user base typically drives substantially higher sales.