Faster but user more power. (Will get you something like  ~0.2 BTC per month if it's a dedicated machines and uses about 360W at full load I think) Play around with this: http://www.bitcoinx.com/profit/

The last few months rapid increase in difficulty has virtually killed GPU mining. You simply pay more for electricity than the value of the bitcoincs generated, unless you get your electricity for free. If you can't afford ASIC miners and need bitcoins for something specific, it's now cheaper to just buy them.