After working a while with one and the other, I prefer the original categories+ latests posts instead of the current latests post
Assumptions:
With categories it visually looks more structured/tidy imho
Most importantly, the categories show which topics are usually discussed, giving an immediate overview for beginners. (Who, in contrast might be overwhelmed with only many recent posts)
Thanks, can the order of categories change dynamically (in response to activity)?
If the order must be fixed, then it might be good to demote (from second and third places) the two that are empty. And then review the order, a few weeks after things gain momentum.