A while back I got an HP Spectre 360 13-w023x ( i7-7500U, 16GB RAM, 512 SSD), and I also looked and the XPS13 among others. I got the HP instead because of significantly better price for similar specs (sale at Costco) and few other small things, forgot all the specifics. I think one of them was complaints regarding coil whine on the XPS. I wanted the 360 because it can go tablet or tent mode. I didn't really have an option of no touch.
I occasionally use this laptop for photo editing on the road. The 13" screen is too small. It is the FHD (didn't want the 4K for battery concerns) and LR doesn't do very well with the not so adjustable panels. Works fast enough within reasonable expectations but gets frustrating easily if you want to do extensive editing. Photoshop, not soo much but maybe the newer processors can do better. I almost never used the touch. I have an iPad of similar sized screen and I'm familar with the touch to edit concept but on a laptop it doesn't feel right and LR or Photoshop have pretty poor controls in regards to use with a finger. Might try an active stylus specifically for editing, that would probably work better for brushes and such.
Current HP would be this one:
https://store.hp.com/us/en/pdp/hp-spectre-x360-13-ap0039nr , a comparable Dell:
https://www.dell.com/en-us/shop/dell-laptops/xps-13-touch-laptop/spd/xps-13-9380-laptop/xn9380dhngsDell however has newer processors available (with less RAM though) or options with FHD and no touch and still 16GB.
I would be looking at Lenovo too, the 14" X1 CARBON GEN 7 (
https://www.lenovo.com/us/en/laptops/thinkpad/thinkpad-x/X1-Carbon-Gen-7/p/22TP2TXX17G) with similar specs but larger screen and as light.
Overall I don't think touch should change the decision one way or another for LR or Photoshop editing, maybe if you use a stylus. Screen remains too small though for extensive edits.