Answer:
The characteristic that Higgins and Pygmalion have in common is that Both openly declare their love for their "finished products.
Step-by-step explanation:
Pygmalion was an artist he one day looking for creating something worthy and beautiful as he thought art should be, he carved the sculpture of a woman, and at the end he fell in love with this sculpture, the same as Higgins did in his story where he had Eliza Doolittle as the sculpture that needed to be polished.