[WindowsCentral.com]

Best answer: The 7390 maintains the same great design but adds Intel's latest 10th Gen Comet Lake processors and keeps the price on par with the previous-gen model. Right now there's little reason not to get the latest refresh.
Latest and Greatest: Dell XPS 13 7390 (From $999 at Dell)

Full story from the WindowsCentral blog...

[expobill]

the best improvement of the dell xps 7390 is the camera atop the bezel cover.
for those on the fence in upgrading or buying a new laptop like i was last year, i do recommend the dell xps.
i purchased mine this years and love everything about the laptop. I did not get the 4k screen and still marvel at the picture clarity and definition while watching baseball. The laptop is extremely sturdy and windows 10 is such a clean OS i can run my Linux apps seamlessly! I switched from Mac this year (since 1992) and happy, relieved and no regrets doing so!