Bootstrap: space between columns

Question

It can be achieved with 2 methods:

Method 1:

<div class="row">
  <div class="col-md-5"></div>
  <div class="col-md-5 col-md-offset-2"></div>
</div>

Method 2: container nestle

<div class="row">
  <div class="col-md-6">
     <div class="col-md-12">
        Some Content.. 
     </div>
  </div>
  <div class="col-md-6">
     <div class="col-md-12">
        Some Second Content.. 
     </div>
  </div>
</div>