It gets a bit challenging at times when dealing with other martial artists regarding a description of Systema. They see Systema through their own art. In other words, if they wear blue glasses, everything is blue. If they are kung fu practitioner, Systema looks a lot like Kung Fu. Silat practitioners see Silat.
Added to this, Systema practitioners do not always do the best job in describing our art. I have narrowed my answer down to, “Best thing I can say is come to my class.”
It is a disservice when martial artists, particularly Systema practitioners try to mold this art around their prior art(s). Tai Chi practitioners try to make Systema look like Tai Chi. Aikidoists try to make the art into “AikiSystema.” The end result is the inevitable destruction of 2 beautiful arts.
You know what Systema is like?
Systema is unique unto itself. Granted, there is a finite number of ways a human being can punch and kick or defend said punches or kicks and movements from our art can look like movements from others. That being said, stop comparing. Stop trying to label, compartmentalize, classify or pigeon-one this art. Systema is like Systema.
Accept this and our training moves forward.
Deny this and try to jam your history into this art and failure is sure to follow.