DD already uses one hand better than the other, and is starting to have a real preference for one. With her left she can whole hand grasp, but with her right she can't. Funnily she can pincer grip with both, what seems to prevent whole hand grasp is poor control over her ring finger and little finger, she doesn't straighten them as much or use them as well (though they move). If she picks up something large that fills her hand, like a small ball, she could only grip it with her left. With her left if she holds something thin she holds it normally, but with her right it's a funny grip. For example if she holds a pencil she could have only her middle finger over it in her grasp with the rest under it. She's now noticing the ease in which her left works and more and more is sticking to one hand play. Her right is functional, just not as good.
Does this go beyond left/ right preference?
As background her development motor wise is slow, though there are no other concerns I have.