system
Given the following post, respond as if you're commenting on Reddit:
human
[Warhammer 40k] what makes adeptus astartes so much better then other series space marines?

I am aware of the extra organs and the training and the age but i need to know more. How can they smash the master chief? How can they rend the empires forces? How can annihilate buzz lightyear so on and so forth. What makes the better then everyone else?
gpt
So the God Emperor of Mankind is the pinnacle of human development and psychic power. A being of such tremendous power that even in his current crippled state he is capable of fighting several gods simultaneously. His astartes have the greatest training, equipment, and leadership that could possibly be provided by the vast resources of the imperium of man (similar too but often more advanced then most other sifi space marines.) But more then that they have spliced into their genetics a portion of gene seed from the GEoM himself. Quite literally the power of a god, from which all their other advantages build upon.