Looking up monster drops, I noticed some mobs on mapleroyals library doesn't share the same loot table as the BBB hidden street. I'm unsure if I should be trusting the library or hidden street, and any help will be appericated.
The library is correct. BBB hiddenstreet has more content (like maps, quests) but they don't always line up.
To give you a specific example, bbb.hidden-street.net says drops from nightghost include "Dark Scroll for Cape for INT 70%, Dark Scroll for Overall Armor for INT 70%, Dark Scroll for Helmet for INT 30%, Dark Scroll for Cape for DEX 30%, Dark Scroll for Claw for ATT 30%, Dark Scroll for Dagger for ATT 30%" but in reality they drop none of this (IIRC, they only drop Cape INT 60%, Cape DEX 10%, and Dagger ATT 10%) I've found most of what's on hidden street reliable, but in specific instances you have to test things out yourself.
The MapleRoyals library also has information on its server specific godly system for every item. Each item you search up will have the godliest/godly range stats listed, where as BBB Hidden-Street shows a general range of Average, Below Average - Above Average.