M_forward and m_side in counter strike global offensive

Team Collision determines whether you can walk through your team-mates or not.

If team collision is on, then your team-mates will act the same way as an enemy when you come into contact with them, namely, they will be able to block doors and the like with their body.

If team collision is off, then you will be able to freely walk through your team-mates.

This is a mostly anti griefing option, so that people can't purposely block doors to prevent their team-mates from getting out of spawn. It is also a tactical concern, as you can't stuff a bunch of players in one position if team collision is on.

Keep in mind that enemies will always have collision on.

Mostly subjective, really. Some people like CS:S, some people don't. Here are some of the differences. CS:GO has:

• Smaller hitboxes
• Less clutter on maps to block movement
• Tighter recoil (spray and pray does not work well)
• New weapons (a few pistols, shotguns, smgs, mgs)
• New grenades (decoy and flame)
• Better graphics

Some actual improvements:

• Gungame and Deathmatch modes built into game
• Matchmaking
• Rating system
• Elo system
• Arranged team matchmaking
• CS:GO TV, a significant improvement over previous iterations.