Hi Kamil, yes we have a fit profile worked up for all the boots on the site. The Fischer is noticeably wider than the Aliens, and has different length sizing. Visit our boot fitter for a detailed workup.
Hi Jonas, we'd need to know more about your foot to get a complete profile, but you are likely barking up the wrong tree unfortunately. Feel free to reach out with your specifics and we can find you a similar boot.