Yes they are different.
The Standard GTI splitter comes in 2 pieces, the spoiler and the splitter whereas the Eddy has a single piece spolier/splitter. The GTI parts are cheap and are textured, the Eddy part is smoothed (ready for painting) and costs about £280 IIRC. Also consider the VOTEX one, it's still OEM and looks the business, costs £250 from Kunzmann.de.
Part number for Edition 30 splitter...
1K0805903JGRU
Part numbers for standard GTI parts are........
Spoiler 1K0 805 903 H 9b9 £42
Splitter 1K0 807 110 9b9 £40