I likewise have always heard that the rear sway bar is the same accross models.

However, I am always mindful of the trolls out there or those who would say there is some "difference" although getting to that conclusion is challanging for those contending there is something different.

And, for the trolls, when I use the term "rear sway bar" I understand MB used the term (at times) "torsion bar." Got a few snarky PMs about my choice of words. It's a rear sway bar for me.

Thanks for the research.