It will certainly have it's stuff that the PRO3 will not... right now, and until they put in user wavetables (if), the Evolver has user waveFORMS... you mentioned the dual signal path yourself which is probably one of the bigger differences, besides the obvious fact that it has it's own sound character that the PRO3 will not... also it has Curtis filters, PRO3 does not... it also sport one more oscillator... but other than that i see no real advantages to keep an Evolver, unless it's a poly Evolver of course.