Was Kate Middleton's wedding dress copied?

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It looks as if the dress is a clean rip-off of Princess Isabella Orsini's dress who got married two years ago. Isabella's dress also has long lace sleeves which I think is unprecedented. Of course, fashion is all about inspiration but after looking at this one, I kinda lost a lot of fondness for Kate's dress (and designer..who doesn't seem to have acknowledged it). Of course this all might have been a weird co-incidence. Or not..because Isabella is pretty famous in Italy, being the god daughter of prime minister Silvio Berlusconi. Pictures here: http://quazen.com/shopping/kate-middletons-wedding-gown-a-co py/