No, you've decided that I just listed the two models and their specs with their respective prices.
For what its worth for most plus points you can give the Mac you conversely give something else to the XPS, for instance
The Macbook has four thunderbolt ports but that is all it has, the XPS has one thunderbolt, two USB 3.1 gen 1 ports, an SD card reader, gigabit ethernet and HDMI.
You're forgetting that adding those legacy ports is dead cheap in comparison. It makes the device bulkier though.
Can the XPS even charge via USB PD through its lone Thunderbolt 3 port?
The Mac has a better trackpad than the XPS but it has a keyboard that a lot of people dislike and its reliability issue means that it can reasonably be described as a selling point, not sure how useful the Touch Bar is either although Touch ID is nice. The XPS is marginally lighter than the 15 inch MBP aswell so that isn't a plus for the Mac. I think many would prefer the Nvidia GPU of the Dell also.
I'm also talking about the things that make the MBP
expensive, whether or not
one personally might see value in them. The MBP's keyboard for example probably costs a lot more than the XPS's, no matter if you dislike it as a keyboard or not (I for one dislike typing on anything else now, and I've got the 2016 version).
To me, the Touch Bar is great, but it might not be worth the added cost for you. It's an expensive component though which warrants a higher price.
The XPS isn't lighter, at 2 kg it's about 200 grams heavier actually.
Construction and build quality (expensive!) of the MBP are unparalleled, only Razer's offerings come
anywhere near. I mean, just look at how the ports are integrated on the XPS, and keep in mind that thing still is a $2000-3000 laptop:
You might not value a clean build & construction (including the interior) as much as I do. In that regard, most current notebooks (even expensive ones like the XPS) are at a level where Apple was 15 years ago, at most.
The Mac would be value if it was marginally more expensive the fact that a fully specced out MBP is nearly £1300 more than the equivalent XPS is ridiculous. Fully specced out XPS only £50 more expensive than the base model MacBook Pro 15.
Crazy.
As I said, you pay a premium if you want a premium device. At £1300 (35 %) less, the XPS is equivalent in the basic specs you named, but that doesn't mean it's an equal device overall. It also doesn't mean it's necessarily
worth 35 % less, that will depend on who you ask.
I wouldn't mind lower prices for the MBP, but they certainly don't seem "crazy" to me.
Now if you want to argue it's crazy that the 13" 2017 model without Touch Bar is still offered at the original price, or that the ancient MBA wasn't discontinued or massively reduced when the new one came out, I'm totally with you.