Sending keystrokes to an application, SendKeys.Send() vs SendMessage()

I have created a simple bot to automate some things in a game. I'm currently sendings commands to the game by bringing the game window to the foreground and sending keys using SendKeys, like this:

SendKeys.Send("{ENTER}")

What I would like to know is, from a detectability point of view, if it's easier for anti cheat engines and such to detect something like this (using SendMessage):

public static void SendKeystroke(ushort k)
{
    const uint WM_KEYDOWN = 0x100;
    const uint WM_SYSCOMMAND = 0x018;
    const uint SC_CLOSE = 0x053;

    IntPtr WindowToFind = FindWindow(null, "Untitled1 - Notepad++");

    IntPtr result3 = SendMessage(WindowToFind, WM_KEYDOWN, 
                                    ((IntPtr)k), (IntPtr)0);
}

SendKeystroke(Keys.Enter);

In the end, the game would receive a keydown event for the enter key nontheless, right?