Yeah, I find they both have a high mane now. Luke's was considerably higher, but Leia's have now grown to near the same height. Only real way of telling them apart is the old fashion way.
No cypher there is another way to tell them apart. You see the black stripe on his chest, the one that goes under his belly. In the center of it is a v shaped white spot. The same stripe on Leia has a white spot. I noticed that in baby photos the zoo posted of them where they were identified. This should help in the future if the manes stop working but they will have to be facing you.
Its a great method. I would love to be able to work that out for Shani, Tori and Jake too... thought Jake is usually pretty easy. Although it probably wont be necessary.