title: Why qr-code with same mask, version and error correction has different dot distribution?
body: <p>In visualead.com qr-code generator there is option to choose how to fill the qr code. </p>
  
  <p>There are two qr-codes:</p>
  
  <p><a href="https://i.stack.imgur.com/izGH6.png" rel="nofollow noreferrer">https://i.stack.imgur.com/izGH6.png</a>
  <a href="https://i.stack.imgur.com/m0wX5.png" rel="nofollow noreferrer">https://i.stack.imgur.com/m0wX5.png</a></p>
  
  <p>with same data that is encoded with same version=3, error correction level = M and mask=1. But then what makes this different dots distribution?</p>