I got the IKON OCC a while back but didn't like the open comb side that much. It was rather mild.
I got the IKON Slant, it's very aggressive & very smooth. The Slant will draw blood, if your not careful. It took about 2 weeks to get away clean. The OCC took 3-4 passes, but the Slant takes 2-3 passes for same closeness.