Oh... you haven't purchased the Starlink unit yet.
Many comparison YouTube videos out there. But I'll give my two cents from actual experience and after watching many vids.
We traveled the Appalachian mountains last summer with wife's brother. We have a Mini, and he has a Gen 3.
First off... the aiming process in the app is obsolete... just point the dish at any open unobstructed sky.
The Mini has the router contained within the dish.... the dish is about the size of a standard letter size paper, 8 1/2 x 11" roughly. It will easily fit in a backpack.
The Mini can be used with an external router if desired... basically setup like the Gen 3, but the Mini isn't POE, so you have both a DC cable and a CAT cable.
But the Mini is really intended to be self contained. Just set the dish out tethered to the DC cable (it's much thinner than a CAT cable). Then use WiFi to connect to the Mini. Obviously the further you string the cable away from your motorhome you eventually degrade the WiFi signal.
Speed... the Gen series is faster than the Mini... but not magnitudes faster. We weren't gaming or Bit Coin mining. But streaming video, Internet browsing and WiFi phone calls with either worked fine.
I use a Harbor Freight flagpole mounted on my ladder when there's open sky... otherwise I string the cord out to wherever necessary.
My plan for this year is install a switched outlet in a rear storage compartment. Then drill and grommet a hole in the compartment (under the RV... weather protected) to run the DC power cable out to the ladder/flagpole mount... a pretty short run.
I also designed and 3D printed a cable winder for both the Mini and Gen 3 CAT cable, in case stringing out the cable is necessary... easily wind back up and store.
Bottom line... if you're just streaming the occasional video, web browsing etc., either Gen 3 OR Mini works great.
Some folks are roof mounting, but I skipped that because we frequent heavily forested areas... we need mobility.