Can't add that much to the good advice already given. The Rado is a reissue, of their watch from the 1960's, I quite like them both. A Moonphase is an interesting complication. but being an automatic you would have to reset it if you don't use a watch winder. It is quick to set compared to some Moonphases. it would not be an issue for, but maybe for some people. Two very different watches, if you cant buy both its your call. The Longines would be my first choice.
Good luck and please keep us posted.