@Mitch Bailey: If it is installed correctly then yes, files common to more than one variant are symbolic links back to variant "A".

4141980 gf180mcuA
  218944 gf180mcuB
  258400 gf180mcuC
  141864 gf180mcuD
12727296 sky130A
  337312 sky130B

(above:

du -s

run on my installed

/usr/share/pdk

. The base 'A' variant sizes are much larger because I install all essential libraries plus a number of optional ones.)