Rockwell 6S w R6 equivalent to ATT 1-plate

I've been using a 6S and love it. I started with the mildest plate and ended up with the R6 plate. I was surprised that it seems more forgiving than the Fatboy I'd been using before at number 5.

I'm curious what equivalent plate would be for ATT.

Does anybody have any experience with both?

Thanks,
Sean


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