Firegl V Quadro+FireGL Vs. GeForce+Radeon?

Quadro+FireGL vs. GeForce+Radeon? - firegl v

What work Quadro and FireGL are specialized, and the GeForce and Radeon cards for games? Looking directly into the specification, it seems that the Quadro and FireGL cards are very expensive, but it better work obdiviously. What makes it true?