Here are all of the currently released screenshots for both platforms. The PS4 version screenshots are at 4K resolution suggesting they were taken on a PS4 Pro or PS5. The PS4 cannot play 4K games.
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All Red Dead Redemption PS4 and Nintendo Switch screenshots - RockstarINTEL
All Red Dead Redemption PS4 and Nintendo Switch screenshots - RockstarINTEL
Red Dead Redemption is coming to PS4 and Nintendo Switch, no remaster - RockstarINTEL, red dead redemption 1 steam
Red Dead News RockstarINTEL.com on X: How are you feeling about today's Red Dead Redemption on PS4 and Nintendo Switch? View all screenshots / X
All Red Dead Redemption PS4 and Nintendo Switch screenshots - RockstarINTEL
Red Dead Redemption PS4 and Switch physical copies do not include map - RockstarINTEL
Red Dead Redemption - Official PS4 & Nintendo Switch Announcement Trailer
Red Dead Redemption PS4 and Switch physical copies do not include map - RockstarINTEL