I think at your age, it's whatever works with your lifestyle. I've always loved the Alma, and the Trouville seems very fresh to me, a more youthful bag.
The Alma is one of those LV essentials, a classic. You could be using it when you're well into your 50s. Whereas the Trouville looks a bit more modern and fresher. I also believe that the Alma suits certain body shapes better. I am bottom heavy and the Alma probably would not work as well for me. LOL