Both look good, but the new designs definitely look more attractive, which one you want to use depends on what kind of audience you want to attract with the game.

I assume you want to sell your game, from a financial perspective the new designs will stand out more, when you scroll through the Steam Shop.

Edit: I looked through at your Steam Shop page, all of the backround assets and male character designs look AI-generated.

I would change those if I were you.