I think there could be some useful crossover between Iron Chef and Iron DM. I know I saw chicken entrails on Iron Chef once, plus the always tasty beaver anal glands. Food for thought.
More lower level PCs isn't really the same as fewer higher level ones from a balance perspective. Not that SD does balance is a really granular CR kind of way ( thank goodness). I might include an L10 foe in a game with lower level PCs but not with the expectation that they would able to handle...
The basic mechanical chassis that runs both games is functionaly identical. It's the set dressing and additional mechanics that make them feel so different.