You make it sound as if I'm comparing a school bus and a tug boat. A 128i and a 335i are not worlds apart. Same basic chassis, same layout, similar weight distribution, similar suspension tuning and they come from the same era of the same company. In short, they're considerably more alike than different.
The basic question is the same: are there any advantages to keeping a staggered layout on a 128i given the lighter weight and lighter power? I'm simply asking for the advice of other 128i owners about their experiences.