Blackfire One Step vs. HD Speed

Did a 09 Tahoe using BLACFIRE AIO. Can't remember if I was using the Rupes Yellow or the white pad. I think it was the yellow pad. Turned out great!!
 
Does Blackfire one step stain trim. I know Mike said it corrected "piano black plastic" but will it stain a dull plastic that has no gloss or is it just as safe as HD speed?
 
If you have Speed and you want to try BF one step and you want to save money simply use Speed twice to get the extra cut.
 
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