If Sea of Thieves: 2026 Edition generated the same gross revenue on the Epic Games Store, Rare Ltd would keep approximately $192,599,884 - that's $20,618,171 more than on Steam.
At this revenue level, Epic's concrete platform fee would be $26,127,257. 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 $153,108,999.
Note: This is a hypothetical comparison. Actual sales volumes differ significantly between platforms, and Steam's larger user base typically drives substantially higher sales.