Hi Kari, welcome to basenotes!
l tried the EDT & loved it some time ago, but the bottle my bf bought me is the EDP. l don't personally find them very noticeably different, but l would say perhaps the EDP has more richness & maybe more vanilla in the base. The EDP also has greater projection; not sure about the longevity, but both last many hours on me. l think both are beautiful scents, & l've had many compliments wearing the EDP. Why not buy the 30ml bottle if you are unsure? Enjoy your trip!