I've seen Saylor 3x in person and Sam 2x on television. I know that Sam was rated higher, but I think Saylor is better. Both played in small high schools against mediocre competition, so both dominated.
Saylor is a better ball handler, more agile, quicker, a better leaper, at least as good a passer, better defender, and at least a comparable shooter.
Saylor was made for the UConn game of pressing and transition. She throws 50' passes on the money and is a ballhawk on defense like Gabby or Stewie. She has a high basketball IQ and great instincts on the court.