AGA vs. LaCornueTo compare it would be helpful to know which AGA you're considering. If it's the Legacy, the front left burner is 20,500 BTU's and that big honking burner in the center of the LaCornu is only 15,000 BTU's and it takes up most of the stovetop while the Legacy has six stovetop burners.
If you are comparing the LaCornue to the AGA cooker. There's no comparison. The cooker is much more versatile, uses less energy to accomplish more by means of radiant cooking vs. direct heat, is easier to cook on and the food actually tastes better. :chef: