There's more to choosing a binocular than specifications. There is also a very subjective component, which I shall call the binocular "s" factor. This binocular "s" factor covers things that you simply cannot get by reading binocular specifications. It covers things such as ergonomics and personal fit - how a binocular feels in your hands (not mine) or around your neck, how it handles, how it focuses and so on. For instance, some folks still prefer the feel of bulkier porro prism binoculars in this day and age of roof prism binoculars. No accounting for taste, here. The binocular "s" factor also covers intangibles, such as brand preference and loyalty as well as a manufacturer's reputation for customer service and warranty. Sometimes you just gotta go with your gut feeling when choosing a binocular.