Menaphos is even bigger. That is not a facile comparison. Menaphos is
RS gold a proper urban sprawl on par with Varrock: you can enter virtually every construction, have a different conversation with nearly every NPC, and research a few secret locations farther afield if you've experienced everything the Golden City has to offer you. To call the expansion Menaphos is doing it a minor injustice, as there are actually two cities to research beyond the walls - Menaphos and Sophanem, it's anagrammed opposite.
While you'll want to be a mid-level Runescape manhood to enter Menaphos, once inside you'll find a remarkably open town, with just a few areas sealed off till you are farther into the growth's pursuit collection. Beneath the city there is a procedurally-generated skilling dungeon and an enormous Slayer dungeon, the former offering a new and limitless area for non-combat skill fostering, while the latter functions as a high-level Slayer dungeon with monsters beginning at battle level 101.
Of course, that depends upon what level you're as you go into the expansion and how completely you would like to research beyond the four chief quests and 21 level increase to the Slayer ability. That is an unparalleled quantity of content for a single Runescape update, and Jagex's intention to release another expansion of
cheap RuneScape gold this size in September and December reveals this isn't a one-off gesture; it's a new way of playing Runescape.