ANH has always been a bit of a jarring visual downgrade compared to ESB, ROTJ, and now RO. Such is the nature of it's comparatively limited budget and effects techniques that were still in their infancy. But that's unavoidable and ultimately a big part of it's enduring charm.
It's also the only Star Wars film protected by the Library of Congress.
This RO question is a bit like asking "does the PT detract from the OT.... or does the OT detract from the ST... or does the SE detract from the Originals... or does the Disney logo detract from the Fox logo?