I only have the stiffer rear bar at this time. IMO there is only slightly less understeer. Not a big difference. Turn in is a little better now (nice). And of course, body roll is reduced. Also a pleasant surprise is that the rear end does not give a harsher ride due to the bar. I can tell just a little increase in hits to bumps, but it is slight. THen again, I have those fairly squishy Pirelli tires on there.

So overall, the rear bar is mostly a win / win for both performance, and not ruining the ride qual.