Re: what could she have done...
Yeah it's not a copy, but I do think there are some important differences other than the obvious ones that come with modeling, lighting, etc.
For example, the outfit is much looser on the model, and I actually think that makes it fall better. It's very fitted on the bride.
The model's sharara also seems to flare out like a trumpet. The bride's looks more A-line, but that may be the way she's carrying it when she walks.