Victoria is a siege TD, Odette is a line breaker TD.
Got Victoria long ago, form monthly log in. Got Odette last time she popped out in the research, about a month ago. I use both.
Odette can be good for breaking through, when you need that one punch to finally break enemy tank holding your group.
Also consider the fact that Victoria has not yet even once popped up in the research.
Now I have my own theory - same as with Ocica - the research has a pool of girls that it can randomly generate from, but there is a limited amount and not every single one is included.
If you really need a TD right now, go pick Odette up, if you dont, sit on those BP.
Honeslty though - If you didnt pick up Catriona who was just replaced by Odette you missed a lot. She is pretty much a tankier Victoria with shorter range.
I myself em waiting for either a good Light Tank or Artillery of not - Minnie/Katyusha type.