3D models and animations may look similar, but they have some defining differences. 3D models are static visualizations created for the spatial representation of objects, buildings or personalities. 3D animations, on the other hand, involve the movement and dynamics of models, i.e. the creation of animation using a model or models. If you need a lively and interactive presentation, choose 3D animation, but if you just need a visual representation of objects, 3D models will suffice. Either way, make sure you explain your needs carefully to the service provider.