I keep getting confused between these two very important Sutras.
So listing how I generally see the distinction between them:
华严经 (Flower Garland Sutra / Avataṃsaka Sūtra) would be the one with 善财童子 (Sudhana) in it.
法华经 (Lotus Sūtra) would be the one with the teaching of all beings having the potential to become Buddhas
Some online reference: