michael, alot of that stuff can be opinion, or just someone who is really biased twords one steel for one reason or another.(the had a knife of it that broke ect.)

just to let you know.
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most of those are GREAT steels IMO though, and I'd say s7,5160,52100,1095, A2 and carbon V are all good and generally tough steels.
and s7 is VERY easy to sharpen along with 1095.

sorry, I don't really know that much about the rest of the steels, so I'll let other people chime in.