Differences include different plant heights, different leaf shapes, different flower characteristics, etc.

1. Plant height: The plant height of cigar flower is about 30 to 40 cm, which is relatively short; while the plant height of Gypsophila has a wider range, about 30 to 80 cm.

2. Leaf shape: The leaves of cigar flower are opposite, needle-shaped, and relatively thin; the leaves of gypsophila are relatively narrow and long, between 2 and 5 cm in length.

3. Flower characteristics: The flowers of cigar flower are purple-red, can bloom all year round, and have a relatively long flowering period; the flowers of Gypsophila have various colors, including white, pink, blue, etc. The flowering period is mainly concentrated in June.