Canon Ais3 or Ais31 is better. Or are they all the same?

hello! Canon A31 reference price: 125 yuan; another one: Canon A3 reference price: 1179 yuan; the price difference between the two models is only 71 yuan. Comparative evaluation: Canon A31 and A3 are almost exactly the same in design, body and weight. The main hardware configuration: the lens, LCD screen and image processor are the same. There is basically no big difference in shooting function. Compared with Canon A3, Canon A31 has the following improvements: 1. Canon A31 has 12.1 million pixels, which is higher than Canon A3' s 1 million pixels. However, the size of CCD remains unchanged, and only the pixels are increased, which will not substantially improve the image quality-that is to say, the image quality of the two models can be regarded as no difference. Moreover, the 1-megapixel Canon A3 has been able to print large photos larger than A3 format (about the size of a calendar), which is more than enough for home users. 2. The high-speed continuous shooting of Canon A31: 2.6 frames per second, slightly higher than the 2.1 frames per second of Canon A3; 3. The fuselage color of A31 is richer than that of A3, with three colors of brilliant red, blue and silver. The Canon A3 has only two colors: black and silver. The above three weak differences are not worth 71 yuan, which is the basis for the selection of these two models.