While Astrotrain shares some similarities with the Seekers, like being a Decepticon and a jet transformer, he is actually classified as a Triple Changer. This means he can transform into three different forms:
* Robot
* Space Shuttle
* Train
The Seekers, on the other hand, are a group of Decepticons who are exclusively jet transformers and are often under the command of Starscream.
Therefore, Astrotrain is a unique character with his own distinct abilities and role within the Decepticons.