Start with use case fit, then compare VRAM requirements and speed on hardware you already own. If both are viable, choose the one with better quality for your workflow.
Yes. After choosing a model from a comparison page, open the compatibility checker to validate Q4 fit, VRAM headroom, and estimated tokens per second.
Use model requirement pages to move down to smaller parameter sizes or lower-bit quantization tiers, then re-check compatibility for your GPU.