I'm think it's the russian version of ATS34 which is the same composition as 154CM. As far as I know the are all the same grade, but made by different suppliers.
RWL seems to be the premium choice for russian knives overall, there are som others but the top line stuff is damascus or RWL34.
I personally favor fine grain steels like Sandvik 13C26, but if you like 154CM/ATS34 I think you'll like this one too.