Philips these two razors are relatively good, cost-effective. The main difference is that in addition to the slightly different color and shape, the HQ916's blade head is better, suitable for hard shaving. In addition, the HQ916 is more than the HQ912 low power indicator function, and the use of a full charge longer. I think no matter which is OK to buy, it depends on your own needs to choose it, the beard is harder to choose HQ916 is more suitable.