prajna vs jnana across schools

Can anyone explain the difference between the terms prajna and jnana and how they differ between schools? I learnt for several years with a chinese tradition, where we were taught that prajna is experiential wisdom as opposed to jnana being intellectual wisdom, a view which I am told by my friends who read pali is shared by the pali cannon, however my understanding is that in tibetan buddhism the useage often seems to be the opposite (see for example John Reynolds' "the golden letters") Can anyone shed some light on this issue?