For Blender workload, the M3 just outright beats the M2 Ultra with all the GPU advancements and ray-tracing. Not everything is about video editing. You would think Apple's best of the best would be.....best.No, dude, no. The Ultras are used for video production. The M2 Ultra still outperforms the M4 Max for video production (see ArtIsRight's comparisons.)
The M3 Ultra will be the top tool for video producers, for a desktop, for some time.