I want to just say "Show me all laptops that have a screen between X and Y size, can be configured with at least N GiB of RAM and ...". But instead you have to basically find all of the different lists of laptops on the site and go through one-by-one.
Satisfied Precision m5520 Anniv Ed user here (Ubuntu 16.04 LTS integration was top-notch, including Quadro graphics and calibrated 4K UHD touch panel profile). Also have matching XPS 15 with GTX graphics, FHD non-touch.
Edit: to be fully forthcoming, my daily driver is a Razer Blade 14 (2021) FHD-144 Hz, using a Ryzen 5900HX processor, with an aftermarket Intel AX210 WiFi 6e card. I seem to collect laptops like some folks collect cats....
That they market the Precision line towards business users and the XPS towards consumers is a marketing choice
Want a Precision machine? Buy one
Want an XPS? Buy that
They're findable in under 10 seconds on the main page
OP's claim that they're "hard to locate" is false :)
There could also be issues with support. I've had a few desktop replacement laptops and they've all had some strange things about them: for instance, if you have a lot of RAM, battery life in sleep mode is not very long.
Some models can be preconfigured with Linux, so I assume the support for Linux in precision line is better than in XPS.
But this post from yesterday (mostly criticizing XPS) is discouraging:
https://news.ycombinator.com/item?id=30333956
They seem to be heavier than XPS laptops (3560 is the lightest).
A friend who worked at Dell had to look up the SKU link on some internal system and send it to me.