There is no difference at all between personal emptiness and phenomenal emptiness.
Personal emptiness is simply the fact that the personal self is just an imputation made on the basis of the aggregates [of form, sensation, perception, volition, and consciousness]; it has no inherent existence.
Phenomenal emptiness is simply the fact that objects like pots, the body, and so on, including the aggregates, are imputations made on the basis of their assembled parts: they are empty of intrinsic being.
Consequently, the only difference between these two kinds of emptiness lies in the objects that are taken as their basis.
The understanding of phenomenal emptiness is the antidote to clinging to phenomena in general, while the realization of personal emptiness is the antidote to the cause of samsara. Aside from this distinction, there is no difference between these two modes of emptiness.
—Jamgon Mipham, The Ketaka Jewel