I'm a huge Kona Fan, i would think a tad more than Fat in my early years, but this was down to exposure.
For me the early Kona's were there golden years, or mine at least. But they did suffer with bent forks, poor alignment on the early lower end models, Track II issues etc. the geometry I think suits the Uk terrain and weather conditions perfectly, More so than a Fat, but even with all this said and done, its an unfair comparison in my eyes. like comparing a Top of the Range Stumpjumer with a Top of the Range Ritchey.