they don't sound the same because the tracks have no eq, no fx and no PG music balancing of the tracks that make for the overall sound of the style that created the file.

as you say .......... 'no Band In A Box EQ, no Reverb and no Effects'

that's why i drop and drag files to RB these days rather than open BIAB files in RB because RB does not have the fx and eq

drag and drop exports tracks with the eq and fx - although there is a setting to centre and remove fx