Probably not now, since Vector has been retro-fitted to implement the List interface (it didn't originally).
It is however possible that Vector's synchronization might be slightly more "refined". Collections.synchronizedList() simply wraps a List in an object that synchronizes ALL its methods, whereas Vector's might be a bit more "tailored" - but you basically have no way of knowing without looking at the source code.
However, as I pointed out in your other thread: Vector is a "legacy" class and, as such, its use it generally discouraged.
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