The Austone is only available in a 175R16. The Champiro is available in 205/60R16 (Closest to stock size), and is available in both H & V speed ratings.
The Champiro looks to be very, very similar to the Hankook Optimo H426 that I am currently running. Just from the profile of the Champiro I can tell you it will be a good handling tire. Multiple websites are giving the Champiro good to great reviews.
Other than that the only other differences I see is that the Champiro is a heck of a lot more affordable than the Austone.
Looks like the Champiro VP1 is a winner to me
