I played through the Red and
Gold versions lately, and my conclusion is that neither game has held up well (though ironically, I had more fun with the former despite liking the latter more back in the day).
Sometimes, they're fun little bonuses like a
gold version of a weapon, or an extra mission crammed into a game with umpteen quests, but
lately pre-order incentives have either become too convoluted to suss out or place a significant feature behind a paywall.