The part not taken into consideration is the difference obtained by subtracting the amount under subparagraph 2 from the amount under subparagraph 1:(1) the amount of the revenues deriving from the imposition of the tax on the units of assessment belonging to the category of non-residential immovables or the category of industrial immovables provided for in section 244.34;
(2) the amount of the revenues that would derive from the imposition of the tax on the units of assessment referred to in subparagraph 1 if the basic rate were applied.