MJF, FDM or resin? It's the first question anyone with a 3D file to produce asks themselves. Each technology offers different performance, materials, tolerances and costs; choosing the most suitable one directly affects production times, budget and the final result of the project. A wrong choice can lead to rework, reprints or technical compromises that could have been avoided with an informed decision upstream. This guide compares the three main families of 3D printing used today in the industrial field: Multi Jet Fusion (MJF), Fused Deposition Modeling (FDM) and MSLA resin printing , with a decision table, selection criteria by application and specific recommendations for sectors such as medical and aerospace.