Question 1 — Do you need audio-video sync in one pass?
Both Gemini Omni Flash and Seedance 2.0 generate synchronized audio alongside video. If you need frame-accurate lip-sync for a single-speaker clip — product testimonial, talking head, explainer — Gemini Omni Flash has the edge in the Gemini Omni vs Seedance comparison. If you need SFX and music that carry across a multi-shot sequence, Seedance 2.0 is stronger.
- Single speaker + one shot → Gemini Omni Flash
- Multi-shot story with continuous audio → Seedance 2.0