An effect can look right in one frame and still behave differently in motion. Here is the workflow I use to move Unity VFX into Cocos Creator for the browser.
Start with one effect. If the comparison shows a mismatch, fix it and replay the same case.
Check the behaviour in Cocos: blending, simulation space and timing can change the result.
Align the camera and playback clock. Use differences to guide frame review, then check browser performance and input separately.
A low average difference can hide a short missing flash. Inspect motion, bursts and trails, and check warnings for empty or frozen captures.
Cocos Creator capture of a ported 3D Lasers effect. Original Unity asset: Hovl Studio, 3D Lasers. The full captures support validation; this GIF shows motion.
AI-assisted tools help with inspection and repetitive conversion. Repeatable captures make the result reviewable.
Explore the current browser demos: https://unity2cocosporting.web.app Which part should the next visual guide unpack: materials, timing or trails?