I dont really have a preferance between either company but get the Sano. The Sik50's swingarm will cause your bike to ride stiff and harsh due to the changed mount point on the swingarm. So unless you want it to feel like you are riding a brick get the Sano. And for anyone who wants to give me crap I have ridden the Sik50's swingarm back to back with my Foes which is identical to the Sano (both Billetware) and my Foes felt 10x better.