I use both when using Lancome's Hydra Zen tinted moisturiser (I use a Clarin's anti-ageing cream). This particular brand used to be very moisturising but they switched the formula to make it a BB cream and now it isn't anywhere near as good, IMO.
I have gone back to using Chanel's tinted moisturiser and it is fab. Needs nothing beneath - very rich without being greasy.