They are both good in different aspects. And they both have a number of different issues that makes it hard to judge which one would be the inferior game. So the question rests more with the users tastes. Do you like multiplayer enough to pass on a single player game? Or do you not care about multi/single player element of a game and focus on something else instead? For me, I've been playing a lot of fallout and genuinely enjoying myself for the time, since to me it is more fun than destiny. But after I've done all the quests and got all my companions to love me and explored all the places and killed all the enemies and acquired all the weapons and armor? Either destiny or back to skyrim to do the same.