This paper proves that the q-model structures of Moore flows and of multipointed d-spaces are Quillen equivalent. The main step is the proof that the counit and unit maps of the Quillen adjunction are isomorphisms on the q-cofibrant objects (all objects are q-fibrant). As an application, we provide a new proof of the fact that the categorization functor from multipointed d-spaces to flows has a total left derived functor which induces a category equivalence between the homotopy categories. The new proof sheds light on the internal structure of the categorization functor which is neither a left adjoint nor a right adjoint. It is even possible to write an inverse up to homotopy of this functor using Moore flows. Contents 1. Introduction 1 2. Multipointed d-spaces 4 3. Moore composition and Ω-final structure 9 4. From multipointed d-spaces to Moore flows 14 5. Cellular multipointed d-spaces 18 6. Chains of globes 26 7. The unit and the counit of the adjunction on q-cofibrant objects 30 8. From multipointed d-spaces to flows 39 Appendix A. The Reedy category P u,v (S): reminder 44 References 45