they are deffo the same

if the spoiler is new it should have a fitting kit with it. this has a pair of positioning strips which are used to locate the holes which need to be drilled in the top of the tail gate for the locating pins. it is then bonded on. you may need to get new adhesive for it. i bought one last year and the glue had gone off.
if it is second hand, you'll probably need to clean it off. then it should just glue on, though you might need to either drill the holes or remove the pins first so that it sits right.

my one was also warped, so the pins helped to hold it in the right place while it set.
i think i've still got the instructions/locating pins if you need them. there are also two adaptors for the radio aerial. which one you need depends on the base fitted to the car. again i have the one i didn't use.
hope that helps.
