 If you liked
Shin Kidou Senki Gundam Wing
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 ...then you might like
Kidou Senshi Gundam SEED C.E. 73: Stargazer
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The MCs of both shows are similar due to having a stoic personality. Both have great mecha action as well as drama. The main difference is that in Seed CE 73 Stargazer, there is intensity involved despite being a short series. Some mecha from Earth Alliance in Seed CE 73 Stargazer have elements similar to Gundam Wing as well as the main character organization.