Because both of these devices uses the same driver,
Netiher of these units are compatible with Logic.
The Driver that comes with these products is a very limited use driver that does not allow the MAC OS to see the outputs of the current device.
When you go into the SOUND control panel of the MAC OS to assign the in and outs of these units to USBaudio - it does not allow you to assign the outputs, therefore when Logic boots to find this driver it sees it as incomplete and will tell you that "MAC AV will be disabled for this session"

The only way to make either of these devices work with LOGIC is to purchase an ASIO driver from a third party company. Below is the URL of one such company who makes the drivers for these and other products...
www.usb-audio.com