That's because AoD is objectively better than UR, i.e. Fallout 1 in sewers with MMO elements.
With the exception of perks, Underrail is only influenced by the worst parts of Fallout. FO is a classic, but it’s also a very mixed bag. You have mature themes and good writing, but you also have retarded jokes that doesn’t fit the setting, exploding heads, genocides, etc. Underrail has the silly things of Fallout, but none of its depth that makes it remarkable. You have the ability to kill everyone in one city, but almost zero dialogue checks. You have a post-apocalyptical setting, but that doesn’t have any depth, because it is presented in a childish way and with childish writing. Nobody will be quoting a sentence for the intro of Underrail, or remembering a twist in a quest or a memorable NPC ten years from now, because it’s all childish. The combat is much better than Fallout, but the game is also designed around grinding and backtracking in Diablo style. The list goes on and on. The fact that is obviously heavily influenced by
MMOs other tendencies that have nothing to do with Fallout, results in a completely different game that is only faithful in the 2D looks. If the game is good, it is not because of Fallout influences, I can tell you that. Only a combatfag who hate role-playing would think that Underrail is a new Fallout.