As long as you can find some numerical data to differentiate the different aspects you can put them on cards to compare them. This topic can be cars, tanks, dictators, even poets or elemental particles.
Okay, maybe the idea sounds rather unspectacular and also a bit childish, even boring maybe, but if you think about it a bit, top trump cards are a great way to compress information about a specific topic into a rather small shape, making it easy to compare different aspects of the topic. In the last few days I finally found the will and time to do something I regularly thought of: A top trumps game featuring anime shows!
