When on the battle field, although torso twisting is a good tactic to absorbs damage, if you see a clan mech, feel free to just walk into it and fire... it will pop before it ever gets through your armor. They have less structure, wider spread weapon systems, longer cooldowns, higher chance to receive a crit etc etc etc... if your aim is true, they have no chance to pose even the slightest problem.
This might change in the future as PGI aims at balancing, but as for now, IS rules... no contest whatsoever... pick a good IS mech, make a good build... play with a cool head... and if you are facing clan... you'll be ripping mechs apart godlike
![;)](https://static.mwomercs.com/forums//public/style_emoticons/default/wink.png)
There is more to it of course, like consumables (arty strikes, coolshots etc), number of same weapons types that can be fired simultaneously with no penalty (IS better at that as well), lvl of custom-ability (IS very high on that with armor types, engine types, structure types etc), anyway check other topics on mech building, fighting, etc... as the tip I leave you here, if you have C-bills and you are looking to buy a mech... buy IS!!!
It will make your life a lot easier as a beginner. HF
![;)](https://static.mwomercs.com/forums//public/style_emoticons/default/wink.png)