rCIZZLE said:
If it's not even close there must be a lot of examples.
Here are a few games that are much harder than either Demon's or Dark Souls:
Ninja Gaiden 2 (Path of the Master Ninja + DLC missions on PotMN)
Vanquish (God Hard)
Catherine (Hard + Babel (solo))
Bangai-O HD (completing every stage)
Lost Planet 1 (Extreme)
Mushihime-sama Futari 1.5 (Maniac, Ultra)
Mushihime-sama Futari Black Label (God)
Dodonpachi Daifukkatsu 1.5 (Power, both loops)
Dodonpachi Daifukkatsu Black Label (Power, Strong)
Death Smiles (all rank 3, including EX stage)
Death Smiles Mega Black Label (rank 999, both EX stages)
Pink Sweets (1.00/Arcade)
Muchi Muchi Pork (1.00/Arcade, both loops of 1.01)
Espgaluda II