All of our brains are wired differently. To put it differently, "brain" isn't a box with a few variable configurations. It's literally a dynamical mass of expansive functionality with multiple ways of achieving or not achieving all of the things that we humans tend to do or not do. So, there's no difference to be sought _there_. In terms of our _personalities_, perhaps something could be said of stutterers on average, but it's likely not relevant, or perhaps only relevant in a few cases that don't exhaust life in general at all. If we're different, it's more likely because we're different for _all_ the reasons that people can be different, and not just the stuttering part of things. - --- - As an aside, please don't read Jordan Peterson. There's a lot of other much better things you could (or should) be reading instead. For the academical side of things (which is always a good place to look), here's an overview: https://iep.utm.edu/consciou/