iS sways vs M3

[dstarnesds]

Is there much difference in the e36 325is sways and the M3 sways other than the way the front one mounts ?
Are they bigger or stiffer?
The almost look the same size.

[G. P. Burdell]

The M3's rear bar is thicker. Search on sway bars to find a comparison of bar diameters.