Six volunteers were scanned two times on two different 3T scanners (GE, Philips) using the 3D-QALAS sequence. The intracranial and brain parenchymal volume and myelin content were determined and the brain segmented in cerebrospinal fluid and white and grey matter using synthetic MRI. Bland-Altman plots, Dice coefficient and coefficient of variation indicate that the test-retest variability is very small, but there is an inter-vendor bias for CSF, GM and WM. MyC, BPV and ICV have only a very limited inter-vendor bias. At least for GM and BPV, the expected inter-scanner variation, besides the bias, is below the clinically relevant threshold.