Ever since that Smash Bros. character screen, I legit don't think this point makes a difference anymore.It looks like something that would require a lot of effort to make up at least.
Best leak ever.
Not enough AA.
This most likely be a marketing asset if it is a leak, most likely from some press kit that is being prepared or might be going out soon.
The set dressing around the buildings just looks lower than the stuff seen in the RDR2 trailer, but that could be because its a different environment. Hard to make a call either way on this.