Soft Aim
Soft aim assists your mouse movement, pulling your crosshair towards the target. It looks natural to spectators and is generally safer for legitimate play.
Silent Aim
Silent aim (or "Magic Bullet") redirects your bullets to the enemy without moving your crosshair. It is extremely obvious if spectated but devastatingly effective.
Recommendation
For tournaments and ranked play, always use Soft Aim with a low FOV and high smoothing. Soapimane provides fully customizable smoothing settings to ensure you stay under the radar.