I bought both a 21 Redwood 4001LK ~and~ a 22 Riverstone Legacy 39RKFB.
I sold the Redwood.
There are a lot of features you could compare and contrast... Leaving ALL of that out of the equation, the Riverstone is bigger feeling despite being nearly the exact same floorplan. In the living/kitchen, it's because of the slide configuration. In the master bedroom, it's because of the opposing slide.
The DRV version of the same floorplan is also like Riverstone's. After I saw that "flavor" of the same plan, the Redwood just seemed "small" to me.
It's all just preferences. Like Ford vs Ram etc.
‘21 RW4001LK with 3 ACs * '22 FR Riverstone Legacy 39RKFB