Yeah RDR is one of the better X enhanced BC game's but they've dried up as of late (MGS2 and 3 could have been so good with X enhancements) but even having to play via backwards compatible is something.
It is rather funny that Xbox with the shortest legacy has the best way of older games, where's Sony and Nintendo are happy to put out classic console's that we lose are minds over.
RDR2 is a prequal though, so not sure if you needed reminding about anything.