自己研究明白了...顺便贴出来给以后搜索到这里的人看。
What is difference between V1.2, 2.0 and 3.0?
Version 2 has the same programs as V1.2 but adds MIDI System Exclusive control and archiving capabilities. V3 adds the Inverse Room algorithm and MIDI Clock autotempo features. The presets in the V3 are more special effect type programs as opposed to the traditional delays and reverbs found in the earlier software.