I have the full size - and love it, they both work the same. I camped in the trees last week and had some obstructions but bought a longer cord and it worked out. At one time I had 27 devices connected and most kids and adults where on their phones, last week used 350 gigs of data since everyone was on it (I have unlimited). the days of telling stories are over, fact checking is easy LOL. People watched Netflix at night.
Enabling wifi calling on phone allows phone calls anytime when in reach of the starlink router.
I believe the mini uses less power - so that is a good thing - I have a Ecoflow battery pack 300W that give Starlink about 3 hrs of use before needing charge- the Ecoflow charges quickly (30 mins), I have a solar panel (100 W) and when the sun is out it keeps the Ecoflow charged. - Starlink pulls about 60 watts. My toyhauler has 2 deep cycle batteries and don't have an inverter and probably won't- bought a small gas generator for that can run for 10 hrs on 0.8 gallons of gas vs the on board Onan. If I had to do over, I would have bought a 600W or bigger Ecoflow.
Get the roam plan and you can pause it when not needed and you don't get de prioritized.