The general outline of the plot is similar in that there are "Angels" attacking earth and mechas (called Evas) piloted by certain young people (in this case, teens). Neon Genesis Evangelion is different in that it focuses on psychological themes more than Aquarion, and there is more emphasis on the mystery behind what the Evas and Angels really are.
"Genesis of Evangelion" - "Genesis Of Aquarion". Yeah.
Angels attacking the Earth and young, chosen guys & girls trying to defeat them by piloting robots.
Evangelion is way more psychological than Aquarion, but they both have a fair amount of drama and action.
In both anime, the teens are part of and trained by a more or less secret organization.
Also, both teams have a tsundere in them.
You can see the great similarity in the two simply because they are both mecha's. But on another note, Sousei no Aquarion is based off of 3 robots and conjoin together to form a super mecha in the battle to save earth from "Shadow Angels". While in EVA it's similar, but the robots are already complete and ready for use, and they do battle against "Angels" to protect the Earth from being destroyed. If you're looking from something with Mecha, Romance, and Action, Sousei no Aquarion and EVA are for you. (Although EVA's romance is kinda slim XD)
There both about sortof apocalypic worlds where new races of people try to take over with big mystical things and only a military company and a single or group a special teens can save the human race with demented mechs.
Both have a similar style and a a decent story underneath all the action. Aquarion you have a love story along with trying to save humanity. Heroic age is also a good series where the characters are trying to save the human race, all while trying to understand the main character.
Both series deals with the conflict of battles/wars against a certain adversary. In order to combat their foes, the usage of mecha is employed that requires skilled pilots to handle them..
In both series, the main male protagonist shows aggressive behavior in fighting his enemies but at the same time cares about his comrades. There is also hints of romance tensions between the MC and the main female protagonists from both series.
Among other factors, there is strange origins regarding the mecha of both series as they seem to have mysterious powers. (they are considered super weapons). There is also some comedy, drama, and tense moments between other characters as well as their interactions. read more
Both series introduces the theme of a science fiction world where the main male protagonist is the center of it all. In fact, there is a secret that lies within him related to his past and the main female protagonist of the series is there to help him unlock his potentials.
Both series features the usage of mecha in a futuristic world set beyond our times.
Both series has drama, comedy, action, and romance later on.
Both series' backgrounds also relates to the main female protagonist as well.
+ Transformable mecha units
+ Mecha unit in both anime is not single unit but consists of 3 parts (Head-Body-Legs)
+ Main enemy is something like "alien"
+ MC fighting not alone but in teamwork
+ Aquarion is not controlled by one pilot but 3 pilots simultaneously connected there mind and body into a single coordination
NOTE : Both anime is really good for super sentai fans (power rangers in west)
Both are mecha
Both protagonists are young boys who end up entering a world of "protecting the world" by an "accident" of destiny.
Like Comet Lucifer, Aquarion Evol presents two worlds in which one of them desperately wants to be saved.
The romance of both is something almost left in the background, on account of the adventures, however, pleases.
The two animes are mecha animes with very enjoyable art styles. They may be very different but in their own way the are basically the same with their corny plots you will definitely enjoy both if you have seen the other.
Similar system :
Pilots simultaneously connected there mind and body into a single coordination to access new power & new mecha form
+ Bradyon & Nexon are not required to perform "coupling" process because limited time (only activated for 15 minutes atleast).
+ Aquarion required coordination from 3 pilot since aquarion body is not single unit but consists of 3 different parts & 3 different pilots
Mecha unit in both anime is not single unit but consists of several parts. The main team is composed of one group consisting from several members. Story tells about invasion "alien", to prevent more victims, aquarion & dancougar nova created just for that. To control aquarion pilots must connected there mind and body into a single coordination, dancougar nova also have same condition but with "little exception".
Both Anime are Really Interesting and Both of them are Talking about the Greek Methology, Where in Gigantic Formula are talking about the Greek Gods, While in Sousei no Aquarion are talking about the Stars Signs,Zues and Angels. Well u will get the point when u watch it.
Both of them are similar where they Combine to become more stronger, but in Gigantic Formula they kinda combine and use their enemy weapon or parts when they defeated there enemy.
Ohh i kinda forgot to mention that, Sousei no Aquarion has more Comedy than Gigantic Formula. But Its Still Worth to Watch.
Warriors are reincarnated to fight once again; that is the similarities between the both of these animes. They both have their ecchiness, but display it differently. If your looking for some action, then you are sure to like both of these animes.
Post-apocalyptic animes where humanity is fighting for their survival. Both anime have their own individuality and similarities between plots and characters. If you want action, mecha, and romance; then these two will fulfill your needs.
If you thought Gravion was good with the meka's combination and a bit of a story line wait until you watch Aquarion. Like Gravion, Aquarion meka's are based on combination, however Aquarion has a bit more of a story line behind it ^_^
Both shows are about Mecha (robots), Action and Romance, both have a boy who was living on the streets becoming invaluable when it came to piloting the robots, both are english dubbed so use same or similar english voice actors for both shows so if you liked one you'll definately like the other ^.^