My gloss from this without plotting is that the JBD and the Evolve tune are quite comparable in terms of results. You might be able to squeeze a few more drops of juice out of the tune, PLUS no check engine light...but thats a tradeoff for having to flash.
FS:Sub Amp - works w/ Technic harness! MRD-M300 - cheap
DON'T BUY FROM RAF555!!!! Promised fix! - strung me along til Paypal dispute period expired!