I read about stainless not getting as sharp as carbon on various sites. Supposedly the grain is finer? I admit I have 't done any real testing, just going theoretically here.
First link I found googling here:
http://lansky.com/index.php/blog/the-secrets-of-steel-part-2-high-carbon-steel/
While a little OT, I don't think this writeup is really very fair. I am a huge fan of high carbon/tool steels, but an equal fan of stainless steels. I feel certain applications make one a better choice over the other depending upon the usage it will see.
I think it's almost impossible to approximate all high-carbon steels to all stainless steels as a whole given different tool steels and different stainless steels have different characteristics depending upon the steel, and further the same steel differs (sometimes greatly) depending upon the heat treatment.
Additionally, the article doesn't seem to acknowledge that chromium is only one of many elements going into stainless steels, and that these elements dramatically impact the properties of that specific steel. Alloys allow one to (more or less) tweak a base so that they can create a steel that is matched for an application, and it is why there are so many different steels on the market given they are being made to fulfill certain roles. While a stainless steel may be defined by chromium content, that doesn't really mean a whole lot just on its own in assessing a steel, IMHO. For example, high vanadium content in a steel is generally associated with pronounced wear resistance as vanadium carbides are exceptionally hard (for example, CPM-S110V stainless steel).
I was also a little surprised to see the generalizations about toughness given
he neglected to note that a stainless steel such as CPM-154 is actually tougher than many of the carbon steels he listed by a considerable margin and he compared CPM-3V to CPM-M4 in toughness and wear resistance,
yet these steels really have very different properties.
The other thing that surprised me was that he has grouped steels into the "CPM Series of Steels". At least as far as I know, that signifies a patented PM (Powder Metallurgy) process owned by Crucible. As it relates to how the steel is actually being made and not what steel is being made, it is used on a variety of different steels: some stainless, some not.