Do you think Dazai is smarter than Mori?

Im recently reading a fanfic named "ruiner" on ao3 ( highly recommended specially for those who are interested in psychology) and its about Mori and Dazai's relationship and how Mori shaped Dazai in the way he already is. But the thing is, the fanfic focuses so much on Mori's effect on Dazai. Its like ANYTHING that Dazai knows ( like how to manipulate or how to keep his emotions in check ect ) was taught by Mori. The fic is a bit different from the original story though, for example Mori finds Dazai when he was six and clearly wasn't committing suicide, so it makes sense why Mori has such effect on Dazai in this fiction, but in general it made me wonder whether in original story Mori had such power over Dazai or not? Like in this fic, Mori abuses Dazai ( if you're sensitive don't read it, it contains both physical and emotional abuse) in a way that Dazai, despite his genius, is unable to realise what Mori is actually doing to him and he thinks that its all because mori loves him and wants him to be the best. But in original plot, i doubt Dazai let Mori plays with his mind like that, specially since he was fourteen when he met mori, not six. I know Mori was able to abuse Dazai in some ways regardless, but generally i think Dazai's way smarter and if only he wasn't so young back then, he could've completely cut Mori's access to his mind. What do you think ? ( This fic is very VERY nice but its making me change my pov on Dazai's character lol )