Every bodies eye is a little bit different and if you look at a lot a scopes even brand for brand not all scopes are as good as the next. I look through every scope before I buy.
We compare lots of scopes and this is what we found.
The new swarovski that was just releast
Vortex razor and swarovski HD
and down. I have not looked through the Kowa. After looking through and hunting with the Lieca and swarovski a lot I would look at the vortex. The only thing I wish it had is a wide angle lens(the swarovski lens will fit them
Just my findings good luck.