PLA is ideal for 3D prints where aesthetics are important. Due to its lower printing temperature is easier to print with and therefore better suited for parts with fine details. PLA is generally considered as an odorless filament and might smell sweet as a candy.
ABS is Acrylonitrile Butadiene Styrene a 3D printing plastic. ABS is a strong material and is easy to modify the parts after printing for its higher melting point. It’s an ideal choice of 3D filament for printing mock-ups, concept models, figurines, and all kinds of gadgets and also where durability is required.