Technically the "official" art is unable to discern confidently if it is 8x1, 8x2, or 8x3, but considering we know based on the 2022 model (and an associated paper in the past) that they were looking at three VLS per row, I consider it overwhelmingly likely that the official art was depicting 8x3 rather than 8x2.
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After all the difference between 8x3 and 6x3 (on the 2022 model) is just a plug in module which lengthens the hull a bit, whereas the difference between 8x2 and 6x3 is just.... nonsensical.
I personally have no strong feelings about this new model nor the "official" art from 2023, both may be simply flawed depictions.
However, the idea of going from a 6x3 to 8x3 VLS setup across hull builds for a class, is actually pretty reasonable, and probably one of the simpler ways to give it an "intra-class" block upgrade.