Whenever BMW releases a new version of the M3, it’s always best to compare it to the competition. Often, it’s compared against the Mercedes-AMG C63. However, the new M3 Competition sits squarely against the Alfa Romeo Giulia Quadrifoglio. Both the BMW and Alfa produce 510 horsepower (380 kilowatts)

This isn’t a hardcore, data-driven comparison. The M3 Competition doesn’t go on sale until next summer, but we can compare the two on paper.
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https://www.motor1.com/features/446188/bmw-m3-versus-alfa-romeo-quadrifoglio/