[Son]

Both of the 918 Spyders are equally production ready. The one with the concept style wheels is a "regular" 918 and the one with the crazy paintjob (edit: foilwrap) and the different (edit: magnesium) wheels is a Weissach package car.

http://teamspeed.com/forums/gt/76817-exclusive-details-918-weissach-package.html