Yeah, some of these Sedirea names can be confusing. I've even heard of "Daruma type" or something similar. Maybe it just means smaller, rounder growth habit? I can't be sure, but Satomi and OL does have Seigyokumaru and they're this size, not the dime sized ones.
To be exact, mine is labeled S. Daruma Chabo and yes, it is tiny-- dime or smaller, even.
It's too early for me to grapple with Japanese naming... lol