Personally, dry shaving is not an option for me at all, my face is still somehow, but there is a severe irritation on the neck, as a psoriasis patient walked for 3 days, smeared with cream. This was not the case with any razor and machines, the old Panasonic shaves without irritation.
Foam is better. Foam consumption increases many times, because. the heads literally absorb into themselves, you have to add in the process of shaving and more than once. But still, irritation on the neck is normal,See full review