D2 and Sleipner are somewhat similar because they are in the same cathegory of semi-inox steels, however....
the chemical compositions are quite different, and this is reflected in a very different response in terms of performance.
D2 chemical composition:C=1.55%, Mn=0.3%, Si=0.3%, Cr=12%, Mo=1%, Va=1% Ni=0.3%
Sleipner chemical composition: C=0.9% Si=0.9% Mn=0.5% Cr=7.8% Mo=2.5% V=0.5%
D2 has more Chromium, it reduces a lot the resilience of this steel (thoughness) making it just a bit thougher than inox steels. it's about 30J/cm^2 at an hardness of about 60 hrc.
Sleipner instead at the same hardness has a resilience superior than the one of A2 tool steel, it means about 60 or more J/cm^2 so the resilience is the double.
D2 has more carbon and chromium, this gives D2 an higher abrasive wear, which translates in a steel hard to sharpen. field tests prove it.
Sleipner is easier to sharpen A LOT.
the corrosion resistence is pratically the same, in my direct experience Sleipner proved a bit more corrosion resistent in humid conditions and sea water than D2.
edge holding: Sleipner wins, for sure.
maximum sharpness achievable Sleipner due to a finer grain structure.
in the particular case of Kniferesearch the heat-treats will be done maniacally, so you can stay sure the steel will revail all it's potentials
in conclusions... I've tested both, liked sleipner more, that's it.
I repeat, I have no interest and have no direct connections to kniferesearch, but I'm a collector who loves to use his blades and I've just given my experience, impressions and knowledge to you.
hope this helps.
Thank you for the explanation
How would you compare Sleipner to Viking?
http://zknives.com/knives/steels/steelgraph.php?nm=Viking,Sleipner