I'm going the other way, looking to trade my 66 plate T6 kombi for a defender 110 csw :0)
I've got a 2014 110 XS that I've had from new - it is my "daily driver" but, that said, it's still got less than 20k miles on the clock and, since having the T6, I am using it less and less.
I love the Defender - it's the first car I've owned where the actual MPG matches what the brochure told me I'd get, i.e. circa 25. It's noisy, bouncy, clunky, very expensive to service, has a worse turning circle than an oil tanker, and, at times, totally impractical yet I still love it.
Over the last year or so, since having my T6, I have considered selling it but know that if I do I'll instantly regret it - there are times when having 7 seats (rather than the 4 my T6 and Jo's car give us) is useful and, you never know, we might get some snow during our annual Christmas trip to the Lake District
Buying the Defender was a long held dream for me and a present to myself when I finished work - in some ways I was rebelling - my last 2 company cars were a Prius and a Lexus hybrid (neither of which got close to their advertised MPG).
For now I will keep it but I am definitely seeing it less and less as the long term vehicle I thought it would be and expecting to keep for ever. The good news is the residual values are very high and forecast to go up so keeping it a bit longer may also make financial sense.
Good luck with your new Defender - you'll love and hate it in equal measures