Visual, UI, animations, camera, spellcasting, companion numbers, interactions with environnement, TB, banner (top of this forum), origin characters, character creations (visual), 1 act/maps (confirmed during the AmA), meetings with the companions, companions goal at the beginning are the same, ...
There are many things that LOOKS totally like DoS. I'm not saying it's bad and not saying everything is exactly the same but many things taste DoS, the lore and the rules taste the FR/D&D but nearly nothing taste Baldur's Gate.
BG is not only D&D or the FR even if hearing/reading you, it looks it's the only things lots of players liked about it.
