Despite the fact that R&H spent six weeks at #1, clearly ATYCLB has charted better.
After 40 weeks, R&H was out of the Billboard Top 200. In contrast, after 40 weeks, ATYCLB just slipped out of the Top 100 - and it returned a few weeks later. R&H spent 23 weeks in the U.S. Top 40, while ATYCLB spent 22 weeks there. However, R&H only spent a mere 29 weeks in the Top 100, while ATYCLB has spent 47 - and counting - weeks there.
Therefore, even though R&H was released in the "more generous" pre-SoundScan era, clearly ATYCLB has more chart success. This bodes well for ATYCLB to eventually reach 4x if not 5x Platinum someday (as R&H did) in the U.S. Clearly ATYCLB will have sold over 3 million copies in the U.S. to customers before it finally exits the Top 200.
In other words, I think this is proof that U2 have truly succeeded with ATYCLB, even though it may not have had quite as impressive chart run as other U2 albums.