When they were first born it was easy because Lyla was the one with the receding hairline, but then her hair started to fill in and June started loosing her hair, but it's already growing back again...so I wouldn't go off of hairlines. :)
LYLA- "little brad" (in cute, girly form) she has longer hair (about 1" long). Her eyes are more almond shaped like Brads and darker. She has bigger lips and a rounder face.
Now you can tell them apart even w/o seeing their hair, right?