Look at this (excuse me for the bad quality - there are different kinds of arrows with description on the tank, that you can see after the battle):
Every hit is documented, you know precisely what effect it has.
For every weapon you have a hit table that you can check in the battle (excuse the russian language):
Maybe the best thing for me is this, that Graviteam are incessantly improving the game, and those are often big improvements. For example, they increased significantly the possible force size for the next patch:
Have a look at this site for all the discussion about improvements:
http://translate.google.ru/translate?hl=pl&ie=UTF8&prev=_t&sl=ru&tl=en&u=http://www.sukhoi.ru/forum/forumdisplay.php?f=180
Now, there is also a bad thing - the english version is secondary to the russian version, and the patches, addons etc. first go to the russian version. There is also not enough documentation for the english version. So I personally play the russian version, and some other persons which don't know russian also play this version.
And the last thing that I forgot - CMBN is very good too, I like it very much, the graphics is very nice, especially with modded models. I'm happy to see both games evolve.