Mostly ergonomics, if I recall. Brakes on the hydrostatic moved to the left side on the L-02 series, and I think they've gone to an electric controlled PTO. I'm trying to remember more, but it's not coming to me. I really was impressed with the L3302 I looked at before buying my Kioti, it really addressed the issues I had with the L-01 series, which were comfort related for a fat giant like myself.
Why do I have a Kioti then? I was looking for an L2502, and it didn't exist yet lol.
I like your signature, I've not heard that quote before.