Yes the sport suspension is lower as standard by 20mm (from factory). Most lowering springs lowering amount is quoted from se ride height though. So if you run sport suspension and get 40mm lowering springs you'll only drop an extra 20mm. 40mm is a pretty good drop, I am pretty much flush, but it has scraped a few times on nasty speed bumps, country roads etc. Just gotta take it very careful and it should be fine.