I got my paints from the same place, and your yellow is the same as mine. You may find that in the ad for victory they used a gloss varnish to make it look shinny and appealing!!! I have used a matt varnish which gives a good sheen, but not a shine, a more natural finish.

Photography does not always reflect the actual depth or vibrancy of a colour - to achieve a good, clear photo of a model you generally need plenty of light, this can often result in colours looking brighter or paler than they actually are.

There are often other factors to take into account such as what kind of light was used (although De-Ag probably use a competent photographer who will, as a matter of course, have the right kind of set-up - even so, I do agree that the pic of the painted Victory in the mag looks alarmingly wasp-ish with an almost Canary yellow appearance to the ochre ).

To add further confuddle-ation, the choice of undercoat colour (or lack thereof) will also have an influence on the final result (but that's a subject in itself), gnerally speaking, a white undercoat will give the best results when finishing with 'bright colours (including yellow ochre) whilst Black is (arguably) better for dark ones and is almost essential when using metallics

Be assured that your paint is fine and reputedly accurate, just make sure that you give it a good stir and a vigorous shake each time you use it to ensure that the pigments are well mixed and thin it down before applying to your model to get a nice smooth finish - it may take several thin coats, but the extra effort is well worth it