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 Dinan/RMS stage 2+(VAC cams, CES Cutring etc)
'11 Saab 9-3 XWD tuned(wife)
'06 Saab 9-5 Combi 5mt tuned(Aero interior/Konis etc)