Phonearena quotes Finnish-language Taskumuro site making an unscientific comparison of Samsung Galaxy S7 equipped with Sony IMX260 and Samsung S5K2L1 dual-pixel AF sensors. One can judge the differences on real-life subjects with HDR mode off (many more pictures on the original site):
Sony sensor, click & download for full resolution
Samsung sensor, click & download for full resolution
More PhoneArena thoughts on the comparison is here.