Welcome.
A good friend of mine worked at lotus while the s2 and vx where being developed and he said just the other day while looking at mine that he remembers there being a lot more effort on the build quality for the vx as there was an external QA team.
Not looked at an s2 in detail myself though.
Lightening yellow was a limited run of NA cars by the way. Turbo are a different yellow.
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Lightning Yellow limited edition 2.2’s are exactly the same colour as the yellow turbo. 2.2’s that aren’t the LY’s are different yellows, there were two different yellows used