Two posts here, just to keep them separate and avoid too much rambling in between.
First off, my whisks arrived:
Attachment 133368
The left has thick prongs (less of them) and is used for preparing thick matcha. The right has thin prongs (and more of them) and is used for preparing thin matcha.
Both are Takayama chasen, made in Nara Prefecture by Yasaburo Tanimura.