yes, the seats down as normal, maybe with the XL size you can flip the seats up but maybe you will need like a flat surface or the storage door under the seats.
i believe there is another (expensive) but with headrest covers, this one do not have it.
yes, there is diff between models,
5in screen: Uconnect 3 system, smallest screen on JTs, limited funtions, is basically just and stereo with a small tablet screem
7in screen: Uconnect 4 system, decent screen and full compatibility with smarhphones (carplay and android auto), apps adn satellite...
Ram Mounts
Decided to go with RAM for the mounting solution since they have a lot of acceries you can find them on amazon as well (with even faster delivery than the webpage).
I made my own mount for the gopro (low profile), the ready solution they have is to tall for the dashboad.
X-GRIP...
Trail Rail Cargo Systema + Sofr Roll up cover
1 - The Mopar Trail Rail Cargo System i got it from BAM, and i will be getting every morpar part from them, cheap af (compared to others sites or dealer)
2- MaxMate Soft Roll up Cover a good deal on amazon, get the job done and fits almost perfect.
CONFORT
Rubber Floor Mats
From BAM, cheaper than similar pages and same as product on Mopar/Dealership.
Antenna replacement
from amazon a small detail but looks nice and combine with de red details. Better than stock, biga$$ antenna moving all around