What would be the difference, apart of the named parameters? I mean, does this add any security?
No, or he would have mentioned it.
It's clearer (especially as the number of parameters increase) and easier to change (in order to e.g. add a new parameter)
Named parameters also make it easier to re-use queries (have a queries file or something) because you're much less apt to immediately break something by changing a query if everything is explicitly bound via names. And you can make the statements as a whole more terse if you'd like; I intentionally wrote it verbosely.
In your example, you have one place where you have position based binding that you could break while reusing or refactoring.
There's also the proclivity for people to want to reuse the same value in multiple places in a query. Name-based binding makes that a lot more readable and straightforward.