Personally both are awesome, I always took the GFII scene as a huge contrast between how things were and how they are now, the final comment about the contrast between Vito and Michael, it's lonely and dark and sad at the end. GFIII, IMO, is far more sweeping, and it's like FFC made us psychic for a minute to go over Michael's last thoughts, his fond memories of life and loves before he died, it was very moving, IMO.