They have HDMI AND they have a Lite-On drive (not the other three). Some of the older ones just had HDMI I think.
How to tell if you have a Lite-On drive (requires taking half the XBox apart). Also, Lite-On drives are harder for the DIY’er to flash. That’s why I didn’t do it myself. Maybe that’s changed now? I dunno. Again, XBox-Scene would provide you with that info.