I just looked at the Sideshow listings and have no idea what they mean by Collector's Edition or Re-Run variant. The edition size on the collector's version is confusing too. They both look like the standard version.
As far as I'm aware, the only versions that exist are the standard version and the RIC version, which has blue dorsal fins. Both figures went up for preorder twice on the Ric store, with the latter batch due to release a couple of months after the first batch, so maybe Sideshow is simply listing batch one and batch two with strange wording.