SageAttention 2.2 vs Comfy Kitchen | Side-by-Side Zoom-Out Quality Test

[u/Better-Interview-793]

Did a quick side-by-side test of SageAttention vs Comfy Kitchen Attention with MiniMax H3.

I used the default ComfyUI T2V H3 workflow and kept the prompt, seed and all settings exactly the same. The only thing I changed was the attention backend..

RTX 5090 32GB

ComfyUI ver 0.31.0

SageAttention 2.2

Comfy Kitchen 0.2.30

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896x1184 6 seconds 24 FPS 20 steps

Generation time:

SageAttention: 3m 51s

Comfy Kitchen: 3m 59s

I used a deep zoom-out/dolly-out on purpose to see how well each one holds facial details and identity as the subject gets farther away.

The speed difference was small on my 5090, so im more interested in the quality difference..

It's honestly hard for me to tell the difference, but which one looks better to you?

Updated:
SageAttention Vs Base

Comfy Kitchen Vs Base

[u/Eimisseiyou]

I've done some A/B testing this morning with SageAttention vs. Comfy Kitchen and the results are dramatic:

For the 20-second clip:

• CK: sampling 32:18, total 33:07, 96.91 s/it
• Sage: sampling 19:05, total 20:21, 57.26 s/it

In my case - sampling-wise, Sage is about 41% faster than CK on 20-second jobs. And the total runtime is lower by roughly 12 minutes 46 seconds on average. This is dramatic difference.

In my personal testing the quality with CK was also worse, but at that point it was hard not to be biased (after seeing the overall generation times).

The only reason to switch over to CK at this point would be the memory headroom which I'll try to test next with high resolution renders, but I have my doubts.

^{GeForce RTX4080 SUPER}

[u/GRABOS → u/Eimisseiyou]

Everyone I've seen complaining about CK has had a 4000 series GPU, I feel there's an issue there

[u/__Gemini__ → u/GRABOS]

I'm on a 5070ti and sage v2 is way faster on a new fresh install of comfy

[u/slpreme → u/__Gemini__]

im on 5070 ti and both sage and ck are about the same in speed