This exploratory study examines cultural differences in mental models of AI using 71 imaginaries of potential AI futures, based on the belief that public perception of AI, particularly its biases, risks, and benefits, is essential for setting research priorities, aligning AI, shaping public opinion, and formulating policy. Using convenience samples from Germany (N=52) and China (N=60), we identified significant differences in expectations, evaluations, and risk-benefit trade-offs. German participants generally provided more cautious assessments, whereas Chinese participants expressed greater optimism about the societal benefits of AI. Chinese participants exhibited a relatively balanced trade-off between risks and benefits (β=-0.463 for risks, β=+0.484 for benefits, r²=.630). In contrast, German participants placed greater emphasis on the benefits of AI and less on the risks (β=-0.337 for risks, β=+0.715 for benefits, r²=.839). Visual cognitive maps illustrate these contrasts, offering a new perspective on how cultural context influences AI adoption. The findings highlight key factors influencing public perception, offering insights for aligning AI with societal values and promoting the equitable and culturally sensitive integration of AI technology.