The reason for the different interface of your security center is because your computer has received the updated version of security center which is designed to benefit lot of aspects . And regarding the MCODS.exe consuming high CPU usage , May I know whether you have any other security software installed in the computer . Also, check whether the windows are uptodate.
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As for your inquiry; yes. The McAfee Total Protection suite is my primary solution, with Microsoft's Windows Defender bringing up the rear. Again, the MCODS.EXE high CPU issue only persists on WinXP Pro; I've not seen it occur on other machines that I daily manage.