I am opposite of you and missing my X5 50i over my LR4 as more time goes on. I find myself off-roading less and less and the X5 delivers on-road better by just about every possible measure. The electronics in the X5 as a whole seem like 2-3 generations ahead of LR, despite my X5 was older (2012). I had a ride in my friend's 2015 (new gen) X5 and it just doesn't even compare. I have the X5 itch again.
I have a similar problem...I just test drove the new Q7. It drives like a sports sedan and the technology is far ahead of the LR4. Will probably trade my LR4 for a Q7 later this year. Sometimes we need 2 vehicles to go to the drive-on beach when we have visitors, but the Q7 with air suspension can even do that if needed. (We're still keeping my wife's LR4 long-term)