In the Ag-catalyzed, dye-amplification system reported by Hirai et al., the photographic speed can be kept substantially constant over a wide range of the amount of AgX by the manipulation of dye amplifying processing. Accordingly, along with the reduction of the amount of AgX, the output event areas grow, giving coasrer or more grainy images. A trial has been made to express the performance of the dry toning, halftone electrophotography analyzed by R. Shaw in terms of the amount of AgX (or Ag) with which the performance of the present dye amplification system becomes equivalent to that of the xerographic system. By analyzing image noise as well as exposure required for recording, we have obtained the following conclusions; 1) When the originals are color-separated, halftone images, the xerographic system is equivalent to the dye-amplification system with 15mg/m² Ag. 2) For full-color, continuous tone originals, the xerographic system needs larger exposures, and the equivalent amount of Ag reduces to only 0.4mg/m².