I have permanent "house Internet" through a router in my van, and remote connectivity to my Victron BM and solar charge controller through the Venus, so the new Globallink is designed for someone who doesn't have or want a router or hotspot. It certainly should be a lot less expensive - an AT&T LTE-M/IoT subscription is only $30 a year currently for one device, so even after your 5 years are up you should be able to keep connected relatively cheaply. They may have dumbed it down with less uploads to keep on an even cheaper plan - which is $1 a month for a single megabyte.
The main disadvantage I see is that with my router I have more diversity - both Verizon and AT&T sims - and can also set the router to sip off a WiFi for those rare occasions its present. With the Globalink there are going to be a lot more situations where there is no connectivity.
The other important distinction is that with my Venus I get full remote control - not just monitoring. I can even run the full color display on my phone. I suspect Globallink won't do that as it would be way too much bandwidth for the cheap IoT plans.
Of course I have to pay steep monthly fees for carrier sims with a router, and even with 2 sims there are still plenty of dead zones in remote areas.
Edit: Here is a screenshot of the remote color display from my phone: