comfyanonymous
Inconsistency between KSampler and SamplerCustom from discarding penultimate sigma
Expected Behavior
With same setting, the result of KSampler and SamplerCustom should be the same. If not, it would need to show a hint to explain the difference at somewhere.
Actual Behavior
Currently, KSampler implements discarding penultimate sigma for specific samplers (dpm2, unipc) to try to make their result better. (code here) However, sigmas and sampler for SamplerCustom are created individually, which cannot handle penultimate sigma now. It leads to different result when using those sampler even with same setting.
Steps to Reproduce
Make a workflow including KSampler and SamplerCustom with same setting. Use dpm_2, dpm_2_ancestral, uni_pc or uni_pc_bh2 would find result different. Other samplers would be same.
The first image uses UniPC, and second one uses DPM++ 2M to show the difference.
Workflow above: unipc_workflow.json
Debug Logs
No relevant log
Other
No response
