Not every 3D printer works the same, and different methods garner different results. For example, FDM printers use long spools of filament that get heated similarly to how a glue gun works, and are then laid out on the print bed to form patterns and models. Whilst the quality is great, it's usually a longer process and it takes more work afterwards to eliminate printed layer lines manually. Different resin 3D printer models use an LCD screen to expose light to a pool of resin, while others use a laser to cure the liquid resin. Using resin as a material has its complications and you'll need to take extra health and safety precautions with this such as wearing gloves and avoiding inhaling fumes.