the difficulty rates on the profitability api is different the the networkdiff on the pool JSON page which are both different from the difficulty displayed on the dashboard/pool gui, is one more up-to-date or refreshed more frequently or are they just updated at different times?

http://miningpoolhub.com/index.php?page=api&action=getminingandprofitsstatistics&hardware=nvidia

https://verge-scrypt.miningpoolhub.com/index.php?page=dashboard


https://verge-scrypt.miningpoolhub.com/index.php?page=statistics&action=pool   **JSON link**