Each is handmade with the finest in material and craftsmanship. The other manufacturers are telling you how little they have invested in the quality of the components and in the quality of construction of their product. The truth of the matter is that it is easier and less expensive to throw their product in the trash can than to be concerned with it's repair. Swarovski Optik products are not disposable in an era of disposability. This limited one year warranty will cover any defect in materials and workmanship, subject to normal use.
Some people believe that the higher the power of the binocular, the better.
This is not always true, as higher-power binoculars are harder to hold steady and the resolution may suffer. Higher magnification reveals finer detail because things look bigger, but it also enhances atmospheric conditions such as haze and smog, which can negate the resolution gained from the higher power. Another limiting factor is the resolution of the human eye. The difference is almost indistinguishable when you're looking at stationary objects and not trying to pick out minute detail. When you're trying to capture a bird in flight, it becomes more noticeable.