I always thought resistance was what is measured as ohms. Impedance included capacitance and inductance. All three combined are considered reactance, and as so impede a signal. Hence the need for the phase angle information when matching equipment, mostly amps with speakers. My thinking is fostered by the need to understand for my own purposes.
@jjss49 loved the ramble. I once owned a pair of original model IIs. Think made in 1977, I bought used in 1985. Drove them with my B&K ST 140. Seems to me all his speakers have the strengths you describe. Maybe more dynamic with more resolution as one moves up the line.