RetroGaming

Yeeeeah, I don't know abou that. Typically the copy only lists the pieces not included in the base game. Here for Expedition 33:

The Deluxe Edition includes:

Clair Obscur: Expedition 33 Base Game The “Flowers” Collection - Six outfits and hairstyles inspired by the Flowers of Lumière, along with six additional “Gommage” outfit variations. One for each playable character. “Clair” - A custom outfit for Maelle “Obscur” - A custom outfit for Gustave

Or here for Khazan:

The First Berserker: Khazan DELUXE EDITION includes the following content:

1. The First Berserker: Khazan (main game)

2. Hero's Weapon Set ・ Hero's Dual Wield ・ Hero's Spear ・ Hero's Greatsword

3. Hero's Armor Set ・ Hero's Helm ・ Hero's Wristguards ・ Hero's Pauldrons ・ Hero's Leggings ・ Hero's Combat Boots

4. Digital Artbook

・ The digital artbook features concept art from The First Berserker: Khazan. It can be accessed from the in-game main menu screen.

• The Hero's Weapon and Armor Sets are The First Berserker: Khazan DELUXE EDITION exclusive items and cannot be obtained through alternative means at a later date.

• The Hero's Weapon and Armor Sets can be used cosmetically. These sets can also be upgraded and/or have their options adjusted, allowing for continued usage.

• Clear Mission 2 and open the reward barrel in the Crevice to obtain the Hero's Weapon and Armor Sets.

• Updating to the latest version of the game may be required to access this content.

Listing vanilla content separately from the base game in the same list as the deluxe content without a clear distinction on what you're paying for where seems very unorthodox. I was certainly confused. At the very least it's bad copywriting, and at worst an attempt to get people to go for the more expensive version by misrepresenting its value.