There is one thing I am aware of: White tie is worn differently in continental Europe (or at least in Austria). Vests are supposed to extend half an inch beyond the jacket (or harmonize with the shirt cuff) and many continental tailors I know would refuse to cut a vest differently.
Is this true? I have noticed this, but have thought it is the same as with everyone wearing their jacket sleeves too long, ie. o tempora o mores..