Anonymous I don't really see a difference There isn't much difference to see. Often the continuous form is used when the speaker has made the plan and can still change it if necessary, but the simple form is used when someone or some organization that the speaker has no control over has fixed the plan so that the speaker cannot change it. So in general, native speakers feel that the simple form shows that the speaker feels the arrangement cannot be changed for any reason while the continuous form allows for more flexibility.
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AnonymousI don't really see a differenceThere isn't much difference to see.