Cool, both could be good! But just keep an open mind, sometimes people change their minds a lot, from what looks really good "on paper," when they actually do a rotation in it. I liked neurology a lot and I still like it (though more for neurocritical care), but a neurology residency also means dealing with everything from different types of strokes, movement disorders like Parkinson's, the various dementias, and a lot more. Some people don't like dealing with those kinds of patients, while others love it.