For me, a thin kerf cuts better in two specific instances.
(1) on wood that's 1/4 or less, given equal quality/sharpness/etc of the
blades. I'm at a loss to explain it, but I get a noticeably cleaner cut.
(2) on treated wood. (yea, go ahead and laugh, I rip/crosscut that stuff
from time to time on my table saw for my neighbors...)
In just about any other case, especially the thicker or softer the wood, a
full kerf works better for me.
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