John Gill Commentary Revelation 18:18

"and cried out as they looked upon the smoke of her burning, saying, What [city] is like the great city?" — Revelation 18:18 (ASV)

And cried when they saw the smoke of her burning
(See Gill on Revelation 18:9)

saying, what city is like unto this great city ?
as before for magnificence and grandeur, so now for sorrow, desolation, and ruin; nor was any city like it for power and authority, for pride and luxury, for idolatry and superstition, blasphemy and impenitence; the like the sailors say of Tyre, (Ezekiel 27:30) from whence this and other expressions are borrowed in this lamentation.