There's been lists of prices made and currently, despite Epic's statement that the lower percentage they take would result in lower prices, there is only a single game where this has happened. That would be Metro Exodus. All of the other games are the exact same price as they are on Steam, and have in fact, been on sale at the exact same time and at the exact same discounted price. What this tells us is that publishers are more then happy just pocketing the difference.