What are the differences between Astro Empires and OGame?

Differences are amongst others:

AE | OGame

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Fleets can go anywhere. | Fleets can be sent to a place and will return immediatly.

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Galaxies have a random number of regions with planets, and a random number of systems with planets | All galaxies have a certain number of regions and planets.

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Fleets can fly cost-free | Fuel is needed

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Combat is very tactical | Combat basically consists of spying, estimating and betting.

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