From what I can tell so far, it looks like the drop visually is about the same. I haven't taken any measurements yet but I will get her on level ground sometime soon and post what I find. It is amazing (to me anyway) how much of a difference it makes it the car's appearance.
Here is a peak of mine on the Swifts...
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'10 ZR Black Cherry Sport/Touring/Nav, Swift Springs, Stillen G3s, 15mm-F 20mm-R Spacers, SPC, Spoiler Solutions Rear Wing, Stubby Antenna