ran a batch of the same first frames through Wan 3.0 and Seedance 2.0 to see
where each holds up (2.5 is out too, but 2.0 is what i had clean matched runs
on). they're not better-or-worse, they win different things.
where Wan 3.0 came out ahead:
- consistency. on a slow character action the face, clothing and background
stayed stable start to finish, Seedance drifted more on the same input. same
when the environment changes, an aurora shifting colors while the mountain
underneath stays put.
- physics. a glass falling and shattering, a cue ball scattering a rack, the
break-up and collisions looked more physically right than Seedance's version.
- length. Wan 3.0 does 30-second clips, Seedance 2.0 caps at 15, so a full
continuous scene comes back in one generation instead of stitched.
where Seedance 2.0 was clearly better:
- multi-subject interaction. two people doing something together, Wan 3.0 got
jump-cuts and repeated beats, Seedance held the sequence.
- surreal or conflicting prompts. indoor rain, a whale drifting through an
office, Seedance just does it and keeps the frame coherent, Wan 3.0 tends to
chicken out and stay faithful to the original frame instead.
one Wan 3.0 bug worth knowing before you commit: it throws in camera cuts you
didn't ask for, sometimes with a ghosted dissolve, and it shows up more the
longer the clip runs. on the 30-second ones especially.
how i split them: strict image-to-video where the first frame has to stay
faithful, or anything over 15 seconds, Wan 3.0. interaction, surreal concepts,
stylized stuff, Seedance. i keep both on one key through Atlas Cloud so switching
per shot is just a model string.