So far I cannot really see/think of an advantage of the AFE tune over BMS. Might be a bit too early as not enough people have bought/dyno'd the AFE tune. Meanwhile, I think over 250 BMS tunes are said to have been sold.
'98 M Roadster S/C @11-16ps
'06 Saab 9-5 wagon 5mt Aero+ Tuned