I don't think it would be any different as long as your only importing a kit and not a completed car.
Really, once you understand the process it's not difficult at all. In fact it's so easy, an English Engineer can do it! (That's me by the way Admin

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A completed car runs into a world of different issues such as is it EPA compliant? Do the bumpers pass the pedestrian crash test? Are the lights compliant with US regulations? Are the door handles? Is the theft security to US standards? It's not impossible but...
I can help you bring a kit in but I'm a bit (ok very) out of my depth for a finished kit car!