For the most part I couldn't tell if I was under my ex 81 300SD or my ex 91 300SE. I think the SE had bigger brakes to go along with ABS, but it didn't have the anti-squat doodads that are supposedly on the 560SEL. For that matter, neither does my SDL that I can tell. Basically, if anything changed from 81 to 91 it'll be news to me. But then lots of things continue to make headlines.

FWIW, the W109 has an interesting rear brake set-up. The caliper is held by a bracket that attaches to the suspension arm rather than the hub carrier on the 'mortal' W108. Supposedly the W109 has less brake dive as caused by the torque transfered to the swing axles. I know a W109 hauls down from an indicated 220km/h with enough control to keep the grille off a truck's rear bumper

Sixto
95 S420
87 300SDL