Honest verdict
Gemini is strong, but not for the same reason as Rendervi.
Gemini is a serious option if your team is technical and wants flexibility. The platform gives you fast models, image generation, and room to build internal workflows. But for most architecture studios, that flexibility also means more assembly work. Rendervi is the better choice when you want architecture-ready output and a more direct path from input to final render without turning your team into prompt engineers or tool builders.