A recurve has thin limbs. The difference in different core wood weights are not going to show up much. By the time you add a couple veneers in the stack, there isn't much core, anyway. A straight longbow is a different story, with it's deep core.
How much taper in the limbs and how bulky the tips are have more effect on the recovery of the limbs then type of core, IMHO
Also in my experience, the light colored bocote is noticably lighter in weight with less oil in it then the dark colored tight grained Bocote. The light colored stuff would be my preference if I were to use Bocote as a core wood.
If you love your bow, I wouldn't worry about it.