What does “faces like the side of a mountain and wonderful voices like syrup being poured” mean in the passage (paragraph 16)? in the moustache common lit

In this paragraph the speaker describes his grandmother's look, who is living in a nursing home. He compares her with Ethel Barrymore and says they both have "faces like the side of a mountain and wonderful voices like syrup being poured". He means they both have rough-textured skins, like most elder people, and that they have soft silky voices.

is this a question or a comment