http://www.cutleryscience.com/reviews/blade_materials.html#S_8C13CrMoV
The Meadowlark was significantly outperformed by a Manix (S30V) in slicing aggression on cardboard but ahead of a Point Guard from CRKT (420J2). The Meadowlark matched the performance of a small Sebenza (S30V) in push cutting sharpness while slicing cardboard but again was significantly behind for slicing aggression. The Meadowlark did match a Pacific Salt (H1) for slicing aggression on cardboard. Slicing used carpet, the Meadowlark was not significantly behind a Paramilitary for slicing aggression. Whittling plywood, The Meadowlark had a slight advantage in edge retention on both the push and slice over a Pacific Salt t and a major advantage over the small Sebenza which had durability problems.
On used carpet the Cara Cara was was comparable in performance to a UK Pen (S30V) and Dozier K2 (D2), and was outperformed significantly by several very hard tool steel blades. However the serrated section was among the top showing the advantage of geometry as well as steel in edge retention. The Cara Cara was also used for some heavy prying in woods where it showed a solid combination of strength and durability. The Finch was compared to a no-name chinese knife on slicing cardboard and showed significantly better extended slicing aggression however the angles were too difference to benchmark the steel.
Summary : 8C13CrMoV is basically an upgrade to 13C26 in terms of wear resistance while reducing edge stability. Thus it offers better extended slicing aggression though lower optimal push cutting sharpness and high sharpness edge retention.
On Sandvik 13C26: 13C26 is designed as a razor blade steel it sets a high standard for edge stability and is thus an ideal stainless steel for those who desire a high initial sharpness and keep their blades very sharp.