I think the primary difference contained in that 1% that separates us from Chimps is the advanced verbal behavior abilties that enable us to have technologies.
ET’s that visit would probably have advanced verbal behavior as well (though their DNA profile would likely be completely different).
The question is would they also have other intrinsic advanced abilities that enable them to do things beyond developing technologies.
And will evolution of homo-sapiens lead to a new species that has some additional advanced ability that leaves us in the dust in terms of “intelligence”.
Maybe the little gray men, so popular in ufology, are our descendants visiting from the future.