Comparison of C, N, O, Ne, Mg, Si, and Fe abundances obtained from B-type stars (cyan), CEL (green), and RL (red). For Ne there are two green and red boxes, respectively, corresponfing to different icfs (see text). The height of the boxes represents the uncertainties, indicated in Tables 1 and 5. Note that for Mg there is no evaluation of the uncertainty. See text for more detail.