Difference between MultiplyPoint and MultiplyPoint3x4

MultiplyPoint.cs

// See my SO answer https://stackoverflow.com/questions/35208476/unity3d-difference-between-multiplypoint-and-multiplypoint3x4
// https://github.com/jameslinden/unity-decompiled/blob/master/UnityEngine/UnityEngine/Matrix4x4.cs
public Vector3 MultiplyPoint(Vector3 v)
{
    Vector3 vector3;
    vector3.x =  ( m00 *  v.x +  m01 *  v.y +  m02 *  v.z) + m03;
    vector3.y =  ( m10 *  v.x +  m11 *  v.y +  m12 *  v.z) + m13;
    vector3.z =  ( m20 *  v.x +  m21 *  v.y +  m22 *  v.z) + m23;
    float num = 1f / ( ( m30 *  v.x +  m31 *  v.y +  m32 *  v.z) + m33);
    vector3.x *= num;
    vector3.y *= num;
    vector3.z *= num;
    return vector3;
}

public Vector3 MultiplyPoint3x4(Vector3 v)
{
    Vector3 vector3;
    vector3.x =  ( m00 *  v.x +  m01 *  v.y +  m02 *  v.z) + m03;
    vector3.y =  ( m10 *  v.x +  m11 *  v.y +  m12 *  v.z) + m13;
    vector3.z =  ( m20 *  v.x +  m21 *  v.y +  m22 *  v.z) + m23;
    return vector3;
}