Ah, the hard neck vs soft must be the difference. We were told by a **serious** garlic geek to harvest around August/September and plant in September/October.

https://osseeds.org/ossi_variety/arsia-2/

Not sure what's going on with Garlicana, but you can get a sense of the level of knowledge here:

https://web.archive.org/web/20230602223129/https://www.garlicana.com/garlic-varieties/porcelain/