The version possibly will be different due to screen/processor differences. You don't have NAV, this would be a different computer running the center stack. My GCL is a SR and I would expect differences. My assumption as an engineer... If a Laredo only has 6 speakers and no nav, I would choose a cheaper, integrated head unit/amplifier/display/processor all in one. On higher trims with multiple pairs of speakers + NAV, you need a separate amplifier, more processing power, etc... so an entirely different processor for the display would be needed. On an identical trim level, with NAV or without NAV the entire computer that runs the center stack is a different part number due to different physical hardware/ports. Different computer type = different software.
I suspect the issue is the hardware is the same from Limited ---> SR and the higher end systems are simply overloading it.
Sit tight, the Dodge Durango folks have an 82 page thread on this very Uconnect 5 Issue/Updates. They claim .99 is being pushed in a week or 2. I received .99 via OTA or one of the 30+ days it was at the dealership. I suspect Jeep rolled out .99 via OTA/USB at dealerships back in November, had a humongous belly flop and bricked a few vehicles, stopped all OTA on all vehicles, and now there are newer vehicles picked up last week with .98 and mine picked up in August with .99 due to their fiasco.
www.dodgedurango.net
Every platform with Uconnect 5 is having serious issues/bugs/complaints. No, its not a Jeep thing.