As a little bit of research will show, these Pentax spotters are highly regarded as quality optics. I could not discern a difference between them and have decided on keeping the Razor, for now, simply because its slightly smaller size suited my purpose a bit better. I would love to have tried a fixed power eyepiece in the Pentax as many say it enhances the view even more, but I needed to curtail the budget on my quest. Here's your chance to own one for cheaper than a good sale.