Hi OP, congratulations on your engagement. I think there’s something to be said for a wedding dress that suits ‘your style’, whatever that might be, and looks like you, just extra wedding-y. There’s also a good argument for something out of the ordinary that feels really special. Both dresses are lovely.
You mentioned dancing easily, and if really dancing is important to your celebrations I think it’s worth finding a dress that lets you do that. If money were no object, I’d be very tempted to have a very special wedding only dress for the ceremony, and something more like my usual style to change into for the dancing- possibly wearable again as black tie, possibly not white or to be dyed later.
On the other hand if you really want to have just the one wedding dress (and either turn it into christening gowns or pass it down the family?) I would say think carefully about the things you want to do in it and how to make it work for the whole day.
I hope you have a fabulous time whatever you choose.