I am very much familiar with both swarovski or zeiss spotting scope but have little bit of knowledge on Leica scopes. Zeiss Scopes are excellent and has innovative design. These scopes are high-dimensional lens system, lightweight and coated multilayer. In technical specification, they have the widest field view, neutral colors, robustness and preciseness. It is perfect for long-range shooting and hunting under extreme conditions. It is easy to handle, are light weighing. Swarovski scope offers considerable consistency of usage, accuracy and precision at all times. It is the most compact, rugged and reliable series with an impressive range of design as well. This optic delivers elegance, ruggedness, and unparalleled optical performance. Leica scope is also very good optic that is perfectly suited for target shooting, hunting, or wildlife observation. These three scopes are definitely good scopes.