I've done the same thing before... 2 hams - 1 at 7-9 months, and 1 at 12 months.
the younger hams are fine, and are bloomin tasty, but nothing like the depth of the older hams. Also, be prepared that when you cut into it, it's going to look/feel a lot more like raw meat than it does, say, some prime jamon iberico. It's fine to eat, but if you're expecting it to have that dense dry texture, you'll be surprised!