Today at least 4-5 times he created very clean separation in 1v1, with a very Neymar-esque posture. Dembele, even when he manages to succeed in his dribbles, looks like he is about to trip over his own feet with how high his stance is.
Off ball positioning and IQ are obviously strengths for Ansu, but floating into those positions from a wide base. Not just holding those positions consistently. He is faceup, not back to goal.
Great offball goalscorers aren't necessarily 9's. Mbappe, younger Neymar, etc. Even CR of all people was never a 9 despite "great off ball positioning and IQ" and a killer aerial game. It has to do with faceup vs back to goal being the focus of your strengths. Ansu likes his freedom of movement, a 9 is much more of a fixated position and has to work in specific areas.