DIGIRIG with YAESU FT-817 and FT-818ND

Hi guys,
My question about the Digirig system,
What are the differences between the two Tranciver models Yaesu FT-817 and FT-818ND?

I have both Trancivers and I’m not sure if I can use the Digirig for both or are there limitations?

I like the compactness of the Digirig so much but I don’t know if I lose out on the audio quality with the sound card?

Same Digirig kit will work for both models.
You’ll need Digirig Mobile in logic levels configuration, FT-8xx cables set and a USB cable.

I have the cables for my FT-817/digirig. I have Winlink Express and Telnet installed and working on my Windows 10 PC. I want to connect the 817 to Winlink. Anything else I need? How do I go about making the connection? I need all the help I can get. Thanks, Emmett, WA5EWN