something else to consider, though it might seem trivial at the moment, is which one is closer to home? The two places you mention are counties apart and if the time to get there is significant, it could become an extra hurdle in making it easy to get your license.
Then consider where you might like to fly from once you have your license - which one has the better club and social scene, for instance.
Either way, have a great time and enjoy the experience. You'll never regret doing it!
Pitts2112