  A formalism have been recently derived [J. Martinez-Linares and D. Harmin,
quantum-ph/0306057] allowing one to separate different sources of which-way
information contributing to the total distinguishability D of the ways in a
two-way interferometer. Here we apply the formalism to a Quantum Optical Ramsey
Interferometer where both sources, the a-priori predictability of the ways P
and the quantum "Quality" Q of the which-way detector, stems from the same
physical interaction. We show that the formalism is able to separate both
sources of which-way information. Moreover, it is shown that Q succeeds in
quantifying the amount of quantum which-way information stored in the which-way
detector even in cases where D does not.
