Both have titanium bracelets; the older one runs on a battery and has a smaller face, the younger one runs on solar energy and has a larger face. I wear both of them in turn, depending on what the day looks like it's bringing.
The older one has had its glass smashed twice, once during a hockey match and once when my newly-bound PhD thesis fell on it. Each of those events marked a watershed in my life; the first marked the end of a period during which I had come to love the first school of my professional career, the second marked the end of a long period as a returned student. I've changed the batteries four times. The first battery lasted more than a decade, but subsequent batteries have not been so long-lived; they don't make batteries the way they used to, I guess. The bracelet clasp is slightly damaged, but still holds. I would never dream of getting rid of this watch.
The younger one has a very secure clasp. It is a solid-looking item, beautiful in a different way. It does good work, and I am also very happy to have it. It might have less history, but it is also my watch, and I will keep it always.
I have only two watches. I like to think of them as different personalities with different stories, who have somehow ended up sharing the same wrist at different times.