Difference in using clause using within namespace

Question

There is some difference in performance / execution / compilation of C# code when using clauses using inside the namespace?

Basically what I want to know is if there is a difference (beyond structuring) in the following code snippets:

namespace Projeto.App
{
    using System;
    using System.Linq;
    using Projeto.App.Views;
    ...

and

using System;
using System.Linq;
using Projeto.App.Views;

namespace Projeto.App
{
    ...