SB-2 is similar to the MIM J neck, but a tiny bit bigger to my hands. I had to get rid of my L2K due to neck size and got the SB-2. To be honest, I'm sold on the SB-2. I don't care for the overall "look" but tone-wise I'm more than happy. If I ever get enough $$, I'll get a USA L2K with #8 neck neck (owned one at one time but was an idiot and traded).