The “running man” icon means the server has anti-lag enabled. You can toggle this in the server list screen to filter the results based on what you prefer.
A player’s hitbox is one big general hitbox and a smaller head-specific box. The head box does a pretty good job of tracking the actual head model. You can see these by starting a server and setting g_debugbullets to 7. Here’s two quick screenshots showing all three poses and their respective hitboxes.


Both ETPro and Shrub have altered the crouching hitbox by making it lower to the ground. So you can’t shoot over players who are prone with these mods and still score hits.
You’ll find while experimenting that the player hitboxes don’t rotate to track a player’s orientation. This means shooting at someone at a 45 degree angle from “global north” yields a larger surface to hit. Naturally, its the same when they shoot at you, so this is only really advantageous when sniping since the bad guys usually can’t shoot back.
While they share the same theme, RtCW and ET have some differences. The addition of the XP system is one of the big changes. ET tends to be “slower” as SMGs fire at a slower rate and maps tend to last longer. And ET doesn’t have a single player game, which was one of the main selling points behind RtCW.
RK