Cello or Double Bass?

Octavia picture from
 http://broniesandmagic.tumblr.com/  

This is Octavia. She plays the cello at the Grand Galloping Gala and the Canterlot Garden Party. Just like I said- she plays the cello. If you don't know much about music, I'll tell you what is odd about that. You stand up to play a bass and you sit down to play a cello. Octavia stands up to play her cello.

Than how do we know it's a cello? We can tell by looking at where the neck meets the body, and by looking at the flares on the body.

I'll let Octavia explain the difference. Octavia:

*ahem* Let me explain to you why I play the cello and not the double bass. In the diagram below, the red circles designate the flares of the body. If it's not plainly obvious, the cello body has flares that flare out and the double bass body has little to no flares. Modern double basses, however, have started to develop outward flares on the body.
The distinct difference based on visuals on determining whether it is a cello or double bass is where the top of the body meets the fingerboard (the long black board that holds the strings). On a cello, the point where the fingerboard and the top of the body meets is flat, whereas on a double bass, the part is pointed upward. And there you have it! I play the cello!

Picture from http://www.facebook.com/photo.php?fbid=463963076961135&set=a.265554910135287.70177.258948300795948&type=1  

Octavia's explanation from http://www.facebook.com/LadyOctavia