CatBus said:
Check the first post. "native" means designed to accompany video with crawl text and alien subtitles in the same language (thus, these subs do not provide translations for those). "match" means designed to match the onscreen appearance of burnt-in alien subtitles (which I'll be the first to admit is more of a novelty than something I'd want to use all the time, so it's safe to ignore these).
Got it...should have read more closely the first time. Thanks.