One common theme is the exploration of their different backgrounds. Cyno from the desert and Tighnari from the forest have distinct cultures and ways of life, and fanfictions often explore how they bridge that gap. Another theme is friendship turning into something more. They start as comrades and gradually develop romantic feelings.
There's a really interesting Cyno x Tighnari fanfic called 'Under the Sumeru Moon'. In this story, they are on a mission together to solve a mystery in Sumeru. As they work side by side, their feelings for each other start to grow. It's full of mystery and a bit of action, which makes it very engaging. Also, 'Harmony of Elements' is a fanfic that shows how their elemental powers interact and how that affects their relationship in a unique way.
The differences between 'a' and 'x' porn comics can be quite diverse. It could be the way the characters are portrayed, the quality of the illustrations, or the themes explored. Sometimes, one might have a more unique approach to sexual content than the other.
The main difference might be in the characters or scenarios presented. 'A vs X' comic porn could have specific character conflicts or unique storylines that set it apart from the usual.
The main distinction of porn with a story genre from regular porn is the presence of a coherent narrative. Regular porn often jumps straight to the sexual action, while the story genre tries to add some kind of story framework around it. But in the end, both are adult-oriented and feature explicit sexual content.
Well, it's hard to say for sure. The concept of 'porn-like' is quite subjective. Some might consider certain novels with excessive sexual descriptions as such, but it depends on individual perspectives and cultural standards.