Global Middleware VS Group that wraps all the routes

Currently I noticed all the routes are wrapped with a few middleware. My first thought was to move it to the global Middleware array in Kernel.php

And then I was curious: Is there any performance difference if you wrap around all your routes group:

// web.php

Route::group(['middleware' =>['auth', 'some_other_middleware']]), function () {
   // all the routes
}