my guess is that the 8x14 size has always been seen as a heavy rock snare, and has never had a supersensitive strainer. I figured I’d ask here, though. Some of the older players here have spent decades in the industry, from drooling over catalogs in their teens to watching the new offerings every year when they’re older.
The Super Sensitive option for Ludwig metal snares was pretty much special order only by 2013-2014, and was discontinued by 2016. The 8x14" option didn't exist before 2017. So they've never been even available concurrently.