優劣

They're a gorgeous pair of sisters. I'd hate to have to decide between them. It would be like trying to decide whether lilies or roses are more beautiful.

あの美人姉妹、いずれ菖蒲か杜若、二人とも優劣つけがたいね。

I can't tell which work is better than the other.

それらの作品には優劣をつけがたい。

勇烈