I'm not sure why no one's responded to these - I think you've done a really good job! They are nicely lit, you have good detail in both flowers and leaves without any of the white being blown out. I'm not sure which I think is the better picture though - the first has a slight yellow tint to it, the second is whiter but therefore seems colder. I think I prefer the composition of the second, but the actual flower (shape etc) is nicer in the first.
But I do know how hard it is to shoot white lilies in a vase, as I was given some once! :shock: