When bracing my left leg for fast right-hand corners, my knee is jammed into the hard plastic door release handle. And the clutch take-up is so high that my left leg brushes the bottom of the steering wheel, which isn't the greatest of circumstances when screaming into a corner and turning the wheel. The Camaro has plenty of leg room, and no trim pieces to intrude upon my extremities. The steering wheel offers two sets of thick hand grips, while the Mustang offers none. The Camaro's steering gives better feedback, and the car feels much tighter under duress.
Body roll is minimal.
The Z is an absolute blast to drive fast. I found them comfortable, and I really appreciated the elevated seating position. Thankfully, the g-force's generated by the Camaro kept me planted in the seat. You're right about the Camaro feeling tighter under duress. Around town, it gurgles and burps like a newborn baby, turns in ponderously, crashes over bumps, and feels heavy and loose.