The craftmanship of the Hsunami is what sets it apart IMHO. I tried a few different kielwood shafts before going with the Hsunami and to me, the extra money was worth it.
I have an OL-2 Meucci Original. The biggest difference for me was the feel of the hit with the Hsunami on my cue. I can't really describe it. It was as if there was a disconnect with the others that I tried while the Hsunami felt as if it was made for it. I don't know if that makes any sense.
I have the original and the 2.0. The 2.0 has a bit of a stiffer hit than the original and a deeper tone.
I recently acquired a Richard Hsu cue that he made in 2003 and I just happened to have a third shaft on order with him. I asked if I could change my order to match his cue and he did so without hesitation. Richard is great to work with and meticulous in his work so to repeat, the extra money is worth it. Not only that, I feel better working with a small business rather than a bigger company.