is a normal xbox 360 full hd? i got a premium 360 with no hdmi output, im using it on my tft pc monitor with the VGA HD AV Cable, picture looks good to me

im hoping to get a hd lcd screen soon, would there be much difference if i DID have a 360 elite console with hdmi cable into a hd lcd screen? or would my premium 360 with the VGA HD AV Cable into a hd lcd be basicly the same? or would it be better with the hd cable with the different colour jacks on it (and a small switch on it that switchs from hdtv to tv) that came with my xbox?

hope this reads ok and makes sense?

basicly seeing if hdmi cable is better than VGA HD AV Cable

thanks