For several years now, Atlas F1 kept an eye on the battle between teammates with a simple measurement: comparing the qualifying times of each driver against his teammate's. The new qualifying format has made the comparison somewhat difficult - potentially, every driver could be running with a different fuel load. Moreover, with only one lap each in two back-to-back sessions, small errors could divert the results of any comparison significantly. But, we believe that over an entire season all these factors even out and the overall qualifying differentials between teammates remains the best tool to compare the natural capabilities of the drivers. So, with a few charts and several observations, it's time to see who's hot and who's not...

With five double qualifying sessions completed for 2004, the differentials are once again on a roll! Let's see which drivers deserve bragging rights.

Spain Notables

• Setting the Record Straight: The Spanish Grand Prix saw BAR's Takuma Sato set his best qualifying result ever - finishing third overall.

• Exclusions from the second session: Nick Heidfeld and Giorgio Pantano were excluded because Pantano had a slight off, and likewise Jenson Button and Takuma Sato were excluded due to Button's error.

• Changes since San Marino: None.

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