MOPED ARMY

The more teeth on both cogs, the less force on the cogs because you deliver the load over a larger number of teeth thus over a larger surface area.

I don't know if it has any effect on your internal gears. I suspect not, as the total force stays the same.

Do take in effect that you need more chain + more cog material = more weight to bring up to speed. Altho those differences are minimal I guess.