Difference Between FDM and Resin 3D Printing
Fused Deposition Modeling (FDM) 3D printing uses plastic filament that is heated to a high temperature then deposited out an extruder in a series of layers. This is cheaper and great for large prints.
Resin 3D printing uses light to cure plastic at the 405 nm wavelength at smaller resolution. Resin results in a cleaner/smoother look and is good when high detail is required. For large models, this may not be necessary. However, for smaller figures, this may be preferred. See below for several models in comparison.
(Photo courtesy of EC3D)
Small model comparison below: