Can someone help me figure out the difference between: This ship: <a href="http://www.isd.uni-stuttgart.de/airship/einsatz/australien%201993/darwin_4x.jpg" target="_blank">http://www.isd.uni-stuttgart.de/airship/einsatz/australien%201993/darwin_4x.jpg</a> And This ship: <a href="http://www.sanswire.com/sas51/SAS-51b.JPG" target="_blank">http://www.sanswire.com/sas51/SAS-51b.JPG</a> Thank you in advance