You must know, that even quadro k600, a very weak workstation card can still beat gtx titan in term of rendering, video editing.
But, i can't recommend either of these and i do not know much about quadro, but one thing i can certain, get the quadro if you are use the for rendering, video editing.
Get a firepro w7000. You can get it half price from AMD if it is your first such purchase, and it is a very good card. It is far superior to similarly priced quadros, and even beats more expensive cards.