AKAIO is way better then YSMenu, YSMenu's advantages are mainly faster loading time, which AKAIO gets in 1.3, and YSMenu. Besdies that AKAIO beats YSMenu is almost everything (Skins, compatiabilty, plugins!)
YSMenu also has is better supporting the 3in1, but if you don't have that, its suggested you stick with AKAIO