According to the TK article the knife company is actually called HOKC (roughly translated "Knives Construction Skrylev") Blade steel composition was roughly 0.5% carbon, 14% chromium, 1% molybdenum, and 1% vanadium. Edge is described as a flat grind with a fairly steep secondary bevel. Blade length was 5.5 inches, 3/4 inches wide, and 7/32 inches thick. The article shows the handle on the Smersh-4 as the same as the Smersh-5. Regardless the handle is described as a frost resistant rubber. Handle length is 4 1/4 inches in length.
The knife was described as doing very well in both edge retention and tip strength. The usual tests of cutting tomatoes and sharpening wooden stakes provided no problems. Mainly they focused on the Smersh-4 as they did not have a Smersh-5. The Smersh-5 was described as having a longer blade (6 inches vs 5.5), and a guard that has a wire breaker capability in the notch between top guard and blade.
I personally do not like the look of the grip on the current Smersh-4. The Smersh-5 however I like the look and might just buy 1 as the price is not to bad.