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It should, the new Corsa 28mm in 18mm internal fit exactly 28mm wide, and the other good news is that the width of the thread on the 25mm is reasonably wide enough to compensate for the extra wide rims (if the thread width is narrower, the sidewall is gonna get cut up easily on extra wide rims).
I also spoken to a Vittoria spokesperson today about it, and they were saying the new Corsa is better designed for wider rims.
I did, exactly at 28mm, wrote it all up in the last two pages.