I was at the cross roads of what to do with the rearr after installing EMPI's 9600 3/4" sway bar on the front of my 2000 Vintage. My car had no anti-sawy bar up front initially.
I studied the ups and downs of the camber compensator versus a rear sway bar with my swing axle transaxle and ultimatelty went the EMPI rear sway bar route. I've had a number of older (1970 era) 911s that benefitted tremedously from installing a rear anti-sway bar. I understand that these are IRS transaxle cars and that there are differences when dealing with a swing axle transaxle.
However, I am not intending on tracking or pushing my Speedster in turns to the point where the outside wheel would tuck. Knowing that a camber compensator is not really designed to limit the roll of the car, I opted for the anti-roll bar for the purpose of giving me a flatter handling car when engaging turns under moderate driving conditions.
That said, the seat-of-the-pants difference felt after installing the rear anti-sway bar was as expected. It settled the rear end down noticably, and made it less anxious even just driving straight ahead at speeds of from about 30 mpg plus. Also, the car is now very predictable in turns, making a dead pedal a necessaity.
I was also concerned that the camber compensator (depending on the design and whether it was a flater leaf that looped the axles) could adversly impact ride hight. If anything, the EMPI camber compesator seemed to eliminate this issue.
I am sure that there are benefits to each approach, and those running both a camber compensator and a rear anti-sway bar, which seems to me to be the real belt-and-suspenders approach to addressing all issues with the swing axle transaxle.