Easier to see when next to each other but in short here are the differences
GTI - is a 2 part splitter, smaller centre part that attaches to the larger part which clips and screws to the bumper. Made of black plastic.
ED30 - 1 piece, same sort of shape but is deeper than GTI and also comes in primer from factory (and hugely more expensive - more than twice the combined cost of the GTI splitter parts)
Many people do what I did and colour code the main GTI splitter part and leave the centre piece black (same goes for the Ed30 version - people 2 tone the paint)
Like so
![](https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fi1193.photobucket.com%2Falbums%2Faa358%2FBrookesb32%2FIMG_1263.jpg&hash=a158a46a182c0d2df15d579cb8b47d024934d058)
![](https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fi1193.photobucket.com%2Falbums%2Faa358%2FBrookesb32%2FIMG_1264.jpg&hash=5e0e1b85a190d1b10438f1572f8f0f98c8bfcb05)
And one of and Ed30 I found on the web
![](https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fi1193.photobucket.com%2Falbums%2Faa358%2FBrookesb32%2F7DA12F90-C89E-40A4-B411-29D06D165DC9-5267-0000057E1B286EEB.jpg&hash=5bb28fbea01f861f1e39a23aabb382777aaa1eaa)