Probably because Omni actually has 2 different UI’s
This is the main opening screen,
https://screencast-o-matic.com/screenshots/u/Lh/1570100425995-69307.png
This shows you the devices protected via the Omni Hub and from here you can
select Your Computer which is the same as the Premium Avast multi device version product.
https://screencast-o-matic.com/screenshots/u/Lh/1570100750759-79918.png