For 42 slats priced lower slatted frame - for us: optimal price / performance ratio.
However, the delivery time could be a bit faster ... we had about 4 weeks waiting for the slatted frame, as it apparently does not migrate but will be painted when ordered (you can see also positive, so you do not get "old shop keeper").
We are so excited about the slatted frame, that we are still this order for another bed in another size.