>>724899139
Both games take things from each other. OSRS has taken a different path and will NEVER have The Sixth Age and the shit that followed from that, but it's still supposed to be fundamentally the same world, more or less.
>RS2 has The Fight Kiln
>OSRS makes their own version of The Fight Kiln with The Inferno and Zuk
>RS3 uses Zuk for their version of Fight Caves 3 in GWD3
>Everyone likes Gigachad Zuk in RS3 so they borrow some of that lore for OSRS
There are some things that will probably never cross over between games, but there's no issue with things like OSRS adding Strykewyrms and Aquanites with the Sailing update.