Well, for one those stove tops have usually something like an 8,000, x2 10,000, and maybe a 12,000 btu burner(s). Total if all burners are running at once = 40,000 btu
A banjo burner is capable of about 210,000 btu, and you might have 2 going at the same time.
That's 5 times the btu output...