After riding/driving all three vehicles that you have thrown out from the LR family in the given generational group I still think the LR4 is the best hybrid of everything and really miss mine.
My take on each vehicle:
Range Rover (2010)
- Interior I find to be ugly for some reason. Don't care for how they have the buttons on the dash
- Ride was just a little too floaty for me, I like to feel connected to the road and it felt like a land barge (I too had a JKUR with 3.5" lift and 35's w/ AEV suspension and it handled tighter than the RR felt)
Range Rover Sport (2012 Supercharged)
- Really wonderful sporty ride of course due to the lowered stance and stiffer suspension
- Seats fold flat in the rear
- If you get the supercharger you will be getting terrible gas mileage due addiction to the skinny pedal and the noise intoxication
- Did feel a little small on the inside even compared to our BMW X5 50i its like you are in a cocoon almost, anyone over about 5'11" in the back seat won't be able to move their head due to how tight the head room is
LR4 (2014 SCV6, did drive a 2011 V8 once)
- Hands down most utilitarian vehicle I have ever used, our 75lb black lab loved the space in the back. We could put luggage up at the front seats with all seats down and he had the whole thing
- Could stick my mountain bike in the back there is so much space (front tire off and standing like it was fork mounted)
- Ride is a little soft, wish it would have been slightly tighter or that sport mode would have stiffened things up somehow like in the RRS
- Really liked the updated infotainment over the 2010/2011 years but wasn't a huge deal breaker
- Took it wheeling and it was actually very impressive even on the stock 19" tires (nothing crazy but I did miss my JKUR due to simplicity and articulation)
- Kayaks fit easily in the back with the middle 2nd row seat folded down and you can still hold passengers in the others with a kayak on top
I have said it before and will say it again, the best vehicle I could ever want would be an LR4 with either the Supercharged V8 or BMW 50i engine with BMW iDrive and Dynamic mode suspension from RRS. Would be the best hybrid of best items from everything I have ever driven or used.