Mine was penile inversion and scrotal for labia, great results and healing. Twelve weeks post op and I pretty much back to normal with sensate and aesthetically good. Penile inversion is in some ways easier but depends on the amount of working material available to give adequate depth, mine was 5 inches but I can now dilate to 5 1/2 inches. Natal females are usually only 4 inches. Penile and scrotal together is usually done because of lack of material. Having had a penile inversion I am pleased I did but I wasn't given the choice, my surgeon just said that's all I needed with the material I had and I was not a big boy, lol. Apparently its not just about the length to play with but the elasticity of the material. If your skin stretches really well then the depth will be better. I have read of some girls with only a small amount of material length wise have great depth because of the skins elasticity.
Hope that helps
Stardust