>>3845658Sure a bigger pixel captures more light than a smaller one, and needs less gain applied to reach a reference brightness level, but you don't view pixels, you view photos.
Let's assume one camera has 4 times the pixel count of another with the same size sensor, if you're comparing output photo quality you would have to resize the larger image down to the size of the smaller one, which would mean sampling every block of 4 pixels into 1. Sampling is a fantastic way of reducing noise in a signal and with how efficient image sensors have got, the result will be almost identical to the larger pixel sensor.
It all comes down to signal to noise ratio, the bigger the signal (more light gathered) the better the ratio. Let's use an analogy, you have to measure how much rain is falling, would you use 4 large buckets, or 16 smaller buckets with a mouth 1\4 the size of the large ones. The large buckets are going to be more consistent, so your 4 values will all be closer together, but the smaller buckets allow you to take more samples, and they will average out to be just as accurate as your result from the larger ones. The only way to decrease your accuracy is to reduce the total surface area of the mouths of the buckets.
