An example of very good first class product
http://www.singaporeair.com/saa/en_U...lass/index.jsp
An example of very good business class product
http://www.singaporeair.com/saa/en_U...lass/index.jsp
An example of very good coach/economy class product
http://www.singaporeair.com/saa/en_U...lass/index.jsp
As you can see, there's a huge difference.