Play games
Choose the game that interests you and play itfor free.
Complete the quests
Every game has some quests for which you will receive Soul Gems.
Receive rewards
You can exchange your Soul Gems for Steam Wallet top-ups, game keys, CS:GO Skins and other rewards.
Both are the same if you see the name (almost). In term of performance they are totally different m4a4 has a wider spray pattern and little different to control on the other hand the m4a1-s has a smaller spray pattern and spray pattern is quite easy to master . In term of damage m4a4 does less damage then m4a1-s not that much of a difference when target is close.When target is on the other end or far away form the enemy the story changes m4a1-s does a lot of damage then its counterpart . One huge difference the m4a4 is more accurate if you are running and shooting at same time then m4a1 (don't known why).Just like everything something has pro and cons