That was done on purpose. Marvel and dc did a "bet" to have each others teams fight spoofs of each other with the same name. Both books came out at the same time also!there was also the Crusaders in Freedom Fighters #7 and Invaders #14. The DC team was a homage to the Invaders and vice versa.Notably, it's where the Spirit of '76 first appeared. He was the first to take over the Captain America mantel after Cap was frozen.
https://www.cbr.com/comic-book-urban...revealed-69/3/
As for copies aquaman hands down. Rip-off of sub-mariner right down to king of the same city!