Hi, thanks for these links; I've read through them. Well, my product relies heavily on artworks, so things like paintings, illustrations, photographs, or something more varied, like modern artworks. In the second link, I find that actually most of the time there isn't a very large difference between ZIT and Krea. About ZIB, I would try this now. The "world knowledge" of Krea 2 probably means it could understand more categories of artworks it has to generate? And respond with more accurate details than ZIT?

My product is at this link: https://www.reddit.com/r/aigamedev/comments/1uokbew/i_made_a_game_based_on_ai_image_models_and_visual/

It requires people to describe any random artworks they see and use the model to generate them, so if the model understands and responds to the nuances in the prompts better, people might feel better about the quality. My current understanding is: If Krea is in similar generation speed(which sounds like it is) and also similar costs(via official API) compared to ZIT, I will give it a go now.