Jewels? Not really... it's like 2000 Jewels per month. Considering how Advents will give 3000 Jewels after a while, and Raids 3000 Jewels starting from the next one, the 6000 -> 8000 Jewels per month isn't THAT much of a difference.
The difference comes from Dragon Eye Shards. 15 bonus Dragon Eyes Shards per month for the top5 is really, really much for non-whaling players.