Hazel Atlas used their beautiful Florentine mold etched design on two different shapes, flinging poppies and scrolls on angular shape #2 and on rounded shape #1. Compare Florentine Poppy #1 and #2 plates in this post, cream soups, sherbets and cups here, and see the difference in Florentine #1 and #2 tumblers here.
Let’s look at creamers and sugars, two pieces that are so easy to slip into your daily use.
Florentine #1 creamers and sugars have small scallops on their feet and the shapes tend to be round and cupped. Here is the pink sugar. Note the round shape and angular handles. The foot is scalloped, harder to see in photographs but noticeable in person.

Florentine #1 Poppy Pink Depression Glass Sugar Bowl
This is the green creamer.

Hazel Atlas Florentine #1 Poppy Green Depression Glass Creamer
Florentine #2 creamers look like the cups, more triangle shaped, not cupped. The foot is round and smooth. The handle is even more angular and geometric than the #1 handle. Here is the yellow creamer, a lovely springtime color.

Florentine #2 Yellow Creamer
And the matching sugar bowl.
I hope this helps you tell the two so-similar patterns apart!