mysql - Benefits of SPATIAL over using standard bounding box query -

The benefits of intellectual barriers

What are the benefits of using a special query instead of a simple MySQL For example, if I want to meet all the locations within a certain polygon:

Something like this:

Example of the bounding box

  Selection * WHERE GOALAT from geographical position? And? And between geography? And?   
 As I think, the only real advantage is that there will be spatial factors in the curvature of the Earth?  
 Which method is the fastest?   
 
 
 Advantages:  
 
 You can use numbers other than numbers and rectangles You can use, and "-in".  
 If you can use the Spotlight Index, then the performance is a measure of magnitude (depending on the size and nature of your data).   
 Disadvantages:  
 
 Local objects are binary blobs - some care needs to be handled (for example you can not usually copy a price ).  
 The spatial index in mySQL is only available for MyISAM tables.  
 Support in mySQL is somewhat old; Many operations have not been implemented yet   
 If your database is large and you need to search fast in your example, then you should definitely go with the Spotlight Indexes.