Jack, you totally didn't answer or even address his question. He's asking if a low end professional card is better for rendering than a high end consumer card.
I don't know the answer personally, but i can't imagine that a $200 workstation card will even come close to the performance of a $200 gaming card. The workstation cards are just so underpowered at that price range that i doubt drivers would make any difference.
That said, if you're not doing any 3d modelling or rendering, you don't need a high end card anyway. Graphic design programs like photoshop and quark don't rely on GFX performance - they rely on the components in this order: CPU -> ram size -> HDD performance -> ram speed -> THEN gfx performance. Most graphic designers would likely be able to get away with low end cards like a 9400gt or HD4350, unless you have more than 30 or 40 hi-res (100+ mb) files open at one time.