Both are old, bearded, and project a friendly, wise-grandfather image.

Both lead a closed community with strict hierarchies.

Both have elf slave labor.

Both run surveillance operations: Dumbledore has the portraits, Fawkes, the Marauder’s Map (by proxy), and Santa has the Naughty-or-Nice list.

Both maintain a mystique that disguises how much control they actually wield.

However, I still think Santa is more likely to be evil.