They changed the whole game. The graphics, the combat system, the layout. They even have new skills and a lot of new quests and new items. Runescape is now more modern. However that's also the reason why many players quit. A while ago they released Runescape 2007 again and it's called oldschool. Most players play oldschool but some like the new graphics and gameplay. I don't really recommend the new version though.