F-Sport Ride Height vs SE-L

Hi all,

Came across this on ebay:

http://www.ebay.co.uk/itm/Lexus-IS-250-300-350-F-Sport-set-of-new-suspension-springs-shocks-Tokico-TRD-/172133553436?hash=item2813f5951c:g:09YAAOSwXshWtdg7

Wondering if the F-Sport ride height and firmness was/is any different to a standard 2008 SE-L model which I have?

I plan to drop my IS250 slightly when I fit 18's, would be nice to fit genuine parts doing so.

Thanks
Billy