How's the improvement of MBP 15" 2.0ghz i7 compared to 2.4ghz i5

[montblanc1]

How's the performance gonna improve? In general?

 

[tifa]

CPU is twice as fast. One is quad core, the other is dual core. The difference should be really obvious.

 

[oddurs]

The 15-inch 2.0GHz quad core Core i7 MacBook Pro was 33 percent faster overall than the 15-inch 2.4GHz dual core Core i5 system introduced last April. The new MacBook Pro’s Handbrake time was 51 percent faster than the older system, while its iTunes encoding times were 24 percent faster. Duplicating and Unzipping files didn’t see much improvement between the systems, and Call of Duty framerate was slower than the older system.

Source: Macworld