S8980 is Shaver series 8000 dry and wet electric shaver, V-shaped cutting and shaving system, 8-way contour tracking shaver head; The S9111 Shaver 9000 series is Philips' most advanced shaver to date. The unique contour tracking technology fits the facial contour perfectly, and the V-shaped shaving system brings the beard into the optimal shaving position to achieve the most facial shaving effect. There is not much difference in the performance of these two models, you can go to the official website to find similar models to compare.
Philips makes smaller household appliances than Panasonic