hi , shocks

hi people , right if you was to look at a ghia V6 and a st24 , how much lower is the st24 over the ghiax , its just as i live down a road with speed bumps i get p****d off have to slow down to 10mph at each one lol , where when i had my ghiax shock on i could keep a smooth 20mph , i am thinking of going back over to STD shocks but the st24 ones but is thereany diffrence , thank you :L