99% is comparing the entire genome, introns and exons. 92% is comparing known genes gathered from the human genome project and subsequent research. We don't know the exact genes expressed by our ancestors since RNA is far less likely to survive in enough different types of tissue to get a clear picture of the entire genome but 92% of the genes we recognize in ourselves can be found in early hominids using the latter's full genome sequence. Between epigenetics and embryology, we know that the whole intron/exon dichotomy is fatally flawed and evolutionary genetics has long turned to more complex methods to trace relationships, which are very nonlinear even in our near family tree.
Both numbers are ridiculous and meaningless so don't pay them any mind.
> Both numbers are ridiculous and meaningless so don't pay them any mind
I agree that they have little meaning for the purpose of individual and group identity. It's been pretty disheartening, for example, to see some people extrapolate from the discovery of Neanderthal DNA in non-African populations to the current economic disparities between non-African and African societies. Ironicallly, that is a reversal of the previous false stereotypes associated with Neanderthal influence in humans. I guess once it was proven, it had to be turned into a "good" thing.
But the percentages are meaningful for building a picture of ancient human evolution and migration.
Both numbers are ridiculous and meaningless so don't pay them any mind.