Excuse my ignorance, please. What is the difference between the Akai and Roland formats for Symphony of Voices?
Roland format is specific to the S-700 and XV series of samplers/playback devices, and cannot be read by Akai samplers. While most Roland samplers can import or recognize Akai formatted samples, they do not recognize any special performance setups in Akai format.
Roland sample playback devices like the XV-5080 have special Performance and Patch data that is specially programmed and independent of the sample waverform data - the Akai version doesnt' have any of this. Also the library was created and designed specifically for the Roland format, and then converted into the Akai format.
I have several Akai libraries here, and the sample waveforms can be loaded just fine. However, with my Roland libraries there is much more than just the waveforms loaded, with special Performance and crossfade velocity layouts prebuilt. With the Akai libraries, I have to load the waves and then build the Performances from scratch, which is somewhat time consuming.
If you have a Roland sampler, then definitely get the Roland version. If not, or if using Vsampler of some other multi-format sampler, then go for the Akai version. Fwiw, the Roland version cannot be recognized by a PC without special coversion tools.
Hope that helps.