FEROS 2000 (dashed, red in online version) and UVES 2006 (solid) spectra and their differences. Shown are a purely photospheric line (He i 4388) and a line with circumstellar contribution (Ca ii 3933). The temporal variance spectra for the 2000 and 2006 seasons are shown for He i 4388 as well (arbitrary scaling). In neither season did the pulsational power reach beyond ± 250 km s^-1 (dotted lines). The CQE in Ca ii 3933 is embedded in a shell absorption (plus the interstellar line), but the additional absorption at high velocity is photospheric in both lines.