Always Dreaming 4.70-1
Irish War Cry 4.80-1

The 2005 Derby is a similar scenario I feel like. Bellamy Road was coming in with a monster Beyer (120) compared to the rest and with a closer to the pace style. Afleet Alex was coming in from the OP road to the Derby but coming from further back as far as a running style. He won the Ark Derby by 8 lengths and had a 108 Beyer. This is a 12 point difference just like Fierceness and Sierra Leone.

2005
Bellamy Road, 2.60-1
Afleet Alex, 4.50-1.

I also think an inside post/post inside of other speed types could increase Fierceness odds a bit. The gamblers are just sharper these days even on the bigger days.

A recent Derby with potential similar off odds despite not a similar scenario would be the 2021 Derby.

Essential Quality, 2.90-1
Rock Your World, 4.70-1