Are the parts of Renault Scenic expensive comparing to Nissan? Howmuch do they have difference?

Are the parts of Renault Scenic expensive comparing to Nissan? Howmuch do they have difference? Will it be reliable to go with Renault?|||Consider this........More people own cars in the USA than in any other nation. It's Very rare to see a Renault here. If they were competitive with Nissan or Toyota or Honda there would be millions of them here. They are NOT here. Therefore they would seem to be a poor choice.