This doesn't seem to be a fair to comparison power of qualcomm dual core to a quad core.
Let alone the fact there are 100's of other variables, like screen size, screen type, ram size, ram type, Wifi bands, bluetooth on/off, lte on or off.
If qualcomm really wanted to do a fair apples to apples comparison they would compare snapdragon galaxy s4 to exynos galaxy s4.