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In vacua, the light dusting on tergites 3 and 4 is hardly visible, in ornata it is conspicuous. This made (and makes) me believe this is ornata.
I agree that the black vitta is usually broader in ornata. However, this feature is pretty variable. I have seen 100's of ornata. 10 % of them are even totally black !
You can also observe a kind of dark hind margin of tergite, which I have never seen in vacua (admitted: not seen 100's of those).
Finally, vacua is pretty rare and ornata is pretty common. A Gonia should be pretty clear vacua before I'd make that call.

So, all in all, one feature indicates vacua and the others ornata, which makes me believe this is ornata.

Theo