there is good glass, then there is great glass.
top shelf Swaro and Zeiss is great glass. The new noctovids? maybe. From what I hear they are comparable.
then there is good glass. the japanese stuff, meopta, etc. It is good, but it is not great. And the more time you spend behind it, the more you appreciate the step up in quality to the great stuff. And realistically speaking, it's a once in a lifetime purchase. For a few hundred dollars difference over decades of use, the additional cost is worth it for a superior product.
My own past experience with Leica places them a distant competitor to Swaro and Zeiss, and the experiences I've had with the various warranties puts Swaro light years ahead.