LOTS (hundreds) of machines used hard-sectored diskettes, such as
Northstar, SOME models of Heath/Zenith (NOT ALL), Vector, Lanier, etc.
1) NO, APPLE ][ IS NOT HARD SECTORED!
Apple is COMPLETELY soft-sectored. While MOST machines that were
soft-sectored started the track with the index pulse, Apple and Commodore
ignored even the index pulse. Therefore, they would work with
soft-sectored diskettes, hard-sectored diskettes, upside down diskettes
with a write enable notch punched, etc.
2) NO, it has nothing to do with using a 6502.