HS 12 Ybrs = early version, "engine study HS73"
HS 12 Ydrs = improved version with provision for variable-pitch propeller
HS 12 Ycrs = same as 12Ydrs, but "HS77" family, incorporating a raised propeller shaft to give "moteur-canon" or "moteur-affût" arrangement.
All three engines gave same TO power, nominal power and critical altitude (same performances, if you like !)
And 12 Ycrs1 = same as 12 Ycrs, with derated supercharger, boosting low-altitude performance.
The "Tabulated data from Lage 2004" incorporated in the Wikipedia english notice of Hispano-Suiza 12 Y contains many errors and misreadings.
You must read the French version (I wrote it !)
Regards,